Will this board last me 20 or 30 years?
Eh, what? Nobody could answer that question. Consumer electronics are bound to break, and 30 years is a *very* long time. Nobody could guarantee a life span that long.
Or did you by "last me" mean "be useful to me"? Well, it's a *very* low performance board. It equals in performance to yesteryear smartphones, my $129 Efika MX beats it for example, and that's just the CPU, the Efika has many HW accelerators for media playback etc. It should be able to play back DVD resolution MPEG2 video (thanks to the Overlay support in these drivers), but anything more than that would be over the top I guess. It lacks completely L2 cache, as well as Altivec, and the clock frequency is low. So will it "last you 30 years"? Well, you tell me...