@Kesa
I wouldnt touch OS4 again, even if with a stick because:
1.Slow boot times. I wouldnt leave a hobby OS computer 24 hours on, hence booting time, when in the mood to tinker is relevant on any hobby OS.
AmigaOS 3 have slower boot time for me. If you are booting into a clean Workbench AmigaOS 3, then it may be very fast, but if you add all the patches, hacks and applications that wouldn't bring even half of the usability of AmigaOS 4 (fully working connected TCP/IP stack, Dock, 32-bit icons, virtual memory, contextal menus, visual prefs, memory protection etc..) it will boot much slower, if booting at all.
2.Restrictive hardware requirements, not only in price, but in performance and availability.
Same can be said about AmigaOS 3 and MorhpOS. Your point exactly being?
3.No relation to what I knew as an Amiga, except trademarks and the boing logo.
The last real Amiga that you knew as is AmigaOS 3.1. 3.5 and 3.9 are coded by third parties. AmigaOS 3.5 is a joke, 3.9 fixed most of the needs of Aminet patches, but still comes with restricted TCP/IP stack. Currently AmigaOS 4 have the best TCP/IP stack of all AmigaOSes.
4.FUD coming from the company that develops its OS. And a cult like sect of followers that try to delude everyone else, this is the second coming of Christ, thinking everything else represents the evil.
Same can be said for AmigaOS 3.5-3.9 and MOS. Your point exactly being?
5.A hell of a buggy OS to deal with. Believe me, I ´ve been there, and I had GrimReaper all over me, on a deafult install, on good working hardware (tested on linux).
AmigaOS 3.9 is buggy as well. To get it to usable state you must install gazzilion of patches and hacks that start to conflict with each other at some stage of bringing it to half usable modern OS.
6.An OS that is a resource pig, it eats at least 64MB of ram just to stay idle. On 3.x I can multitask even with 512KB!
Run WHDLoad and enjoy all the multitasking of AmigaOS 3.x with 512 KB. Oh, wait WHDLoad won't run with 512 KB. Wait, you will need some patches that will not fit in 512 KB. Okay, reboot press both mouse buttons and disable the startup-sequence. Into the shell that appears, type LoadWB and enjoy the 512 KB fully usable modern OS. Do you like what you see?
7.No really new feature or software that makes it unique or gives it a peculiar charm compared to other hobby OSes.
The charm that its very much like AmigaOS 3 as I know it, only better, upgraded, modern, less buggy and having more applications is good enough for me.
8.Price.
AmigaOS 3.9 was released for free? 3.5? MOS? When?
9.Quality/Vendor support.
Acube, Vesalia, Hyperion provided me enough support when I needed it. Probably you have different experience to which I am really sorry about you.
10.Friendly enough userbase.
All the AmigaOS 4 users I have contacted are friendly with me. All the AmigaOS 3 I have contacted are friendly with me. All the MorphOS users I have contacted are friendly with me. I see no difference.
There are many others, that I could mention, but these are the ones that I feel are my stronger points against OS4.
BTW, You asked a question. I answered in a sincere manner. If you dont like my answer, just learn to live with it. 
Thanks for your answers. I did not agree with you, see above my points.