Capabilities of Photos App and Aperture

Question

I see a lot of discussion about the new Photos app as being a replacement for Aperture, but most of these discussions seem to ignore many of the key capabilities which make Aperture important to many professionals. And the idea that many of these have been removed but will reappear sometime in the future is ridiculous--nobody could run a business using a tool like that. Are you supposed to go out of business until the time in the future when Apple reintroduces the feature you depended on?
I'm also a little skeptical about how "modern" the app is and what a "streamlined interface" it has if it lacks many key features that already existed in the present software and which professional photographers and heavy Aperture users counted on. It's easy to "streamline" an interface if you just remove functionality. What many of the "reviewers" do not seem to understand is that it could take a year of more of heavy work to reconstruct an existing Aperture library with all that it contains because it is not just a hierarchical collection of pictures with keywords.
If you've been looking at Photos, maybe you can fill in some of the gaps in knowledge of features.
--Will Photos retain the edits of Photos in an Aperture library? Pros may have tens of thousands of photos (or more) with edits done over the past 8 years. Suggesting all of these need to be redone is kind of ridiculous. And why would any photographer ever trust an Apple product again if a corporate move resulted in that!
--If some "tools" are missing, then all of them might as well be missing as far as importing an Aperture library since you wouldn't really know which of your tens of thousands of pictures which had been edited were affected. You couldn't trust the "versions" in your library as some would be missing some of the edits. Is there a list of which "tools" are missing? Almost all of them are pretty heavily used by large numbers of people.
--I hear that the "Curves" tool is missing. What? This is one of the most heavily used tools of all, and one that was added to Aperture because of popular demand. What happens to all the edits done with the Curves tool? Do they disappear, making the library of edits useless? What possible reason would there be for removing something that important?
--Does Photos feature a Web journal which allows collections of photos to be output as Web pages to be shared with clients or others?
--Can I exports groups of files in any size and format (RAW, jpeg, TIFF, PNG., etc.)? You have to be able to do this for the product to be of any use to a professional at all.
--Can I take advantage of multiple monitors to do things like show sets of photos and controls on one monitor and a full-screen image on the other?
--I've hear the flags feature is gone. Why? What happens to all the images I've flagged through the years for one reason or another? Are pros supposed to go through 100,000 images they have stored in their library and flag them all again?
--I've heard that "Stacks" is missing. For professional sports photographers, that is essential. You take bursts of images, you want them stacked on import so it's easy to pick the best from a burst and quickly get rid of the best. Why on earth would this be removed? It was one of the key selling points in early Aperture marketing and a heavily used feature.
--Does the new app show the focus points, hot and cold areas, etc. on the pictures if so desired?
--What happens to books, smart albums, Web journals, projects, folder, albums, etc. One heck of a lot of time has gone in to creating all of these.
--Can I search using any metadata, keyword, etc.?
--Can I customize my display to see the metadata I want in a particular situation. I certainly don't want to see all of it, but there are key fields which may be especially important.
--How long would it take to "import" an Aperture library of, say, 500 gigabytes, into Photos? Would this would require another storage medium to store the new library as well as the old? I'm a little wary here, as the Aperture to Aperture 3 upgrade took 24 hours or more for many people.
--Is iCloud storage of photos really practical for professionals who may have libraries of a terabyte or more? How exactly would all of this information migrate into the cloud? Who's got the bandwith for that?
Anyone who could do a proper comparison of Aperture and Photos, from the perspective of a sophisticated Aperture, and not just gush about how it's an improvement on iPhoto, would be much appreciated. I haven't been able to figure much out from what I've seen so far.

Answer 1

The app is in beta and we're not allowed comment. That's standard policy. What you can glean from reading around the web is the same that we can. My read on what I've seen: It's a step-up for iPhoto uses but for Pro users it's time to look elsewhere. It's not a robust Pro tool.