It would have been a bit later and likely much better without Tripos. That was the bad part of the OS.
AmigaOS is good, but on the whole it's not really the OS that is the problem (apart from no memory protection so that big file you're working on with all your programs laid out on the screens and open how you want them - i.e. your workspace - that you have to setup all over again if your computer crashes - also no hibernate or desktop snapshot mode when you restart the computer). And don't tell me to only run programs that don't crash. When you run so many programs who knows when that little bug will rear its head in the program that has never crashed. Also if you are a developer, you are bound to accidentally write some alpha-code that will crash the whole system.
Mostly it is the lack of enough apps that actually run on the OS. This is also the reason why I have installed OS4.0 but not really used it much compared with OS3.9. The best new apps I see for it are OWB and Hollywood.
Yeah, sure the AmigaOS is a joy to use in its fast responsiveness for the speed of the hardware and the not so many layered system software so you can get to the nuts and bolts of it. But without enough apps, you can only use it in combination with Windows/MacOS/Linux. For example, personally, I need to use Java for work, like to be able to see Flash in browsers so I can actually see what the webpage is displaying, like to be able to open video and image files of all kinds of codecs and file types. Like to update the firmware of my DVD writers for better compatibility. etc etc. The OS is technically capable of doing all this, but only if coders can write all those apps, but it is not justified to put in the effort for such a small market with little to no $ rewards when ppl have milllions of other things to do.