Overdoing what, drugs? Not lately, but 10.5.0 had several problems I can mention such as (1) the "data loss" problem, which struck my brother; (2) MacBook "stuck" problem which Apple corrected via Firmware (computers are hard to use when they're stuck); (3) poor quality installer that wiped a lot of people's drives. A lot of people lost a lot of data because of 10.5.0. It was hairy.
When my brother called Apple, the tech said "they released this thing WAY too early" and according to him/her, the data loss problem was wreaking havoc across the nation. But why would we hear about that? There is no system by which we would know. Only Apple really knows how many calls they got.
They stayed up some very late nights to get 10.5.1 as quick as they did. Their lives depended on it pretty much. Now, everything is stable and decent.
Overdoing the statement of problems. Whether that's because of drugs, only you can say.
But I've installed on four machines here at home with very few problems.
I know a fair number of others who also have it and most have also had few problems. a couple of people have had some problems, but one was otherwise software related (his fault), and I really don't remember why the other guy had problems. But this seems typical.
Some people exhibited one or more of the problems, but they have proved to be few, despite the rumors to the contrary.