No more periodic system cleanup?

I'm not quite sure what to call it besides periodic system cleanup that happened in Tiger, but if my computer was on later (although never left it on all night really - put it to sleep when I went to bed) and restarted it the next day, some files would be in my trash to empty all the time. This seems to never be the case with my Leopard. I was just wondering if there was possibly something I'm missing out on or if there was a way to manually do it.

Since 10.4.2 they are automatically postponed and taken care of later by launchd, if your Mac is sleeping at 3:15 (daily), 3:15 (weekly) and 5:30 (monthly).
That's right you might miss some though, if you shutdown your Mac every night or in some other rare occasions,
but the main point here is that these tasks are nothing at all that so very important.
Running them once a month to stay clean is far enough (that's what I do myself. I'm not saying they are totally useless).
They were more important in the early years of Unix, when HD capacities were small and various error messages were filling log files on systems that were running without any interuption for years, 24/7/365...
Then they became a kind of fashion with Jaguar and MacJanitor, when Mac OS X was running them during the night *only if the Mac was not sleeping*.
These times are far behind, except for some utilities developers and for some advisers who are stuck in their ancien knowledge.
Now in Leopard, if we let it run we might learn that there is yet another improvement in automation, that we don't ever need to run them anymore at all, no even once a month.
Of course if we compulsively jump on the first available utility, we do what we already did in Tiger (10.4.2): we never have a chance to learn we don't need them anymore.
As for Macaroni:
Me too I tried it and advised it then when it was still a little bit useful (Jaguar and Panther). Since Tiger it's just overkill and in Leopard, hopefully 100% obsolete if Leo is now able to automate also the post-shutdown situation.
More importanly in this thread:
Needing to install third-party utilities as soon as possible, before we even begin to know well what's new and what works even better than before, is not a good approach IMO.
I would've not reacted, but I know
(for example the French forums where OnyX author is always happy to show his knowledge and feel he's so needed...)
that this utilitie's hype is going to spread so fast, implying the wrong idea that Mac OS X cannot survive without tinkering,
implying that there are no improvements in how system files are handled and cleaned.
These habits are not fed only by some "helpers" here who have a whole set of ready-to-copy-paste replies, it comes also from these, often Windows switchers, who always feel better if they have something to tinker with.

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