Why? If you'd ever tried coding for Windows or Linux you'd understand 
AmigaOS is fast, responsive, configurable and does what I tell it to in a nice understandable way that no other OS does for me.
As a matter of fact, I did. Even working in a management position nowadays, I have a significant coding experience ranging from Z80/8086 ASM (MSX/PC)/ to ObjectiveC with even some Mainframe Natural Adabas in the middle.
About being fast, responsive and configurable, have you ever tried Windows XP on a really fast machine? How about even Windows 8 on one of those extreme SSDs machines? I can tell you by own experience, boots faster than my 040 A1200.
And then, you can go as roots as you want, ranging from TASM, TCC, GCC, Visual C 6.0 or even the newer Visual Studio...
What get's my attention is the word you used "Understandable". And/or the word "me" at the end.
...again... Nostalgia? Because, I agree with your feelings, but, I suspect the cause is nostalgia.