Syncing App IDs across servers -- Best Practice?

This is prompted by a comment chrisstephens made in the thread at non-existent applications in non-existent workspaces reserving app id's
Our developers are convinced that the application id's between our dev + staging
+ production environments need to be synchronized.Our team also keeps our dev, test, and prod server app IDs synchronized -- for instance, the Widget Reporting App is always app # 38 on all three servers. For us, it's not something we see as REQUIRED, but it is convenient, and a general sanity check. If the numbers didn't sync, it seems it would be all too easy to get values mixed up and accidentally field an app to the wrong place (possibly overwriting some other application).
What is the community's opinions on this? Would you consider this an Apex Best Practice? Just a habit for some groups? Or overly rigid thinking?
(I personally fall in the Best Practice group.)

One good reason to keep them the same is so that there are no differences between what is tested in one environment and what is deployed in another. Case in point, just last week someone demonstrated that an application's authentication scheme failed when the application ID was changed from xxx to xxxxxxxxx (a longer string of digits). Of course this was due to a previously unknown bug, but that's what testing should reveal.
Another good reason is to make it possible to export application components (pages, etc.) from one database (say, dev) and install them into an application in another database (say, prod). This is not possible if the application IDs are different.
Scott

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Let me try to answer your questions.
1)
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Please remember to click "Mark as Answer" or "Vote as Helpful" on the post that answers your question (or click "Unmark as Answer" if a marked post does not actually
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This forum post is my own opinion and does not necessarily reflect the opinion or view of my employer, Microsoft, its employees, or other MVPs.
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The Definitive Guide to Delivering Microsoft Office with App-V

Syncing App IDs across servers -- Best Practice?

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