Oh, one OS worth mentioning for "bad" list:
Microsoft Windows 98
As only "big" update to previous (Windows 95) was that, it forces user
to have & use Microsoft Internet Explorer
-what kind of effect that has for general usage?
Well, it makes system eat much more memory, makes it generally MUCH
more unstabile, and if you use any better web browser, you still waste
system resources for IE, that's running in the background...
And yes, it IS loaded even, if you start Win in safe mode!
If your HD is in state, when you cannot save to HD, you cannot get it
booted, becouse Explorer keeps on crashing & reloading as it cannot
write to disk! (I DO have (bad) experiences on that...)
And as Microsoft said, "Microsoft Internet Explorer is internal part
of OS and cannot be removed"
Luckily, they were telling us (and court) bullshit, yet AGAIN!
It's dead easy to remove, with freely available programs, shouldn't be
too hard to update windows to "Microsoft Windows 98 lite without
Microsoft Internet Explorer" :-)