Interestingly various of the points you raised in a desirable system match what Amiga OS from 2.0-3.9 offered (not sure re OS 4.0), it didn't quite have the stability issue down pat, but various of the other issues you mentioned its always had including near instant boot up times, ability to immediately power off (no shut down), drag n drop install of apps, install updates without rebooting, handling plenty of media formats. It had viruses too, but never spyware, but yeah on a modern system using the Intel community version (AROS) it makes even Linux seem slow!
@ Robert Harrison
Interestingly various of the points you raised in a desirable system match what Amiga OS from 2.0-3.9 offered (not sure re OS 4.0), it didn't quite have the stability issue down pat, but various of the other issues you mentioned its always had including near instant boot up times, ability to immediately power off (no shut down), drag n drop install of apps, install updates without rebooting, handling plenty of media formats. It had viruses too, but never spyware, but yeah on a modern system using the Intel community version (AROS) it makes even Linux seem slow!