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Hehe....makes me wonder where on earth other OS-developments are going. Now, of course those other OS's might have more dingle and dangle, but first you don't really need them, and second, it is (typically) NOT comparable to the amount of resources used when you compare it to MorphOS, BeOS, etc.
Well... other OSs have mem protection,... software,... usable browser,...
Even phones have more memory than and are fast enough to run Linux,... so why spending time feeting the OS in 5Mb when you can spend it on more important stuff ?