Sensible: Be sensible, looks at the required resources to run Amiga OS 3.9, then look at what is required to run Winblows XP or for that matter Linux.
Also, run Amiga OS, pop in a CD or read from a floppy, and still you can at the same time start any program without the slightest delay.
In Winblows you will experience a small delay when inserting a CD, or reading from a floppy, plus in order to even assimilate true multi-tasking you will prolly want to have no less than 256 MB of RAM in order for all to run smoothly.
In Linux, you will need to bring up a command prompt and mount the CD or Floppy, then when you are done, you must open a command prompt and unmount the device...
...this may not work though in which case you may have to log into Super User, kill all processes related to the device, the try to unmount it again, which may not work still in which case you will have to use more complex methods to force the unmount.
I fail to see your logic. And no for some people there is more to a computer than games, such as Video Production (about all movie special effects were done on Amiga's before the Silicon GFX machines got big (years before PC's had more than 16 colors, multi-tasking ect), writing musick, web browsing, coding, ect. ect. ect.
Infact some people like there apps to be written proffesionally, rather than in visual basic or some crap like that were more lines of code are used than needed, resources wasted, stability low, ect ect. Amiga coders were good at making the most of few resources...
...in the future this will be the way once more, just wait and see, Windows isn't portable, and Linux...
...well it is portable if you like command line or shitty GUI's.