The latest computer I have purchased is an i7 laptop and it came with Windows8, which I absolutely hate. I updated it free to 8.1, but it did not help any, and I am so tempted to downgrade to Windows7.
I use it mostly for one MMO game that I play with a few friends and family members, plus my CAD drawing software, but lately about half of my time spent on the i7 laptop is running AmigaForever, which it does very well.
What is really disappointing is that even with all of this power and RAM and hard drive speed, I still experience glitches during video playback occasionally. The simplicity of Amiga (and Amiga inspired) systems is so much more fun and relaxing to deal with. I am always trying to do more on my Amiga/Amiga inspired systems and less on my Windows/Mac/Linux systems.
I suppose you have a point here regarding AmigaOS's ability to manage memory fairly well, if relying on cooperative multitasking with a preemptive scheduler. I also think the message passing and overall efficiency with which the OS and hardware combined can do is something that many operating systems have failed to do.
However, there are severe drawbacks to using AmigaOS for a day-to-day which have prevented me from using it beyond as a novelty on the 3000:
Lack of any basic or advanced security mechanisms
Lack of task isolation and privilege separation, meaning malicious programs can run and lock up a system or send it into a Guru meditation
Lack of sophisticated filesystems with features like RAID, snapshots or crash-safety which I use and rely on every day
Lack of updated browser
Lack of 64-bit support ( I rely heavily on 64-bit math, pointers, and memory addressing for many programs which I run and have had hands in developing )
Also, on Windows, anytime it comes up in conversation these days I think of this immediately, since Android 19 runs Windows apparently with that voice of his:
http://www.youtube.com/watch?v=Fsx09hDU0Sw