I do think that's possible, but it would take more time. 10 years seems reasonable.

What is your justification for this number, other than "too long to test it" or "anything can happen in 10 years"? It seems just as arbitrary as the previous one.

I don't think anyone has foomed yet because nobody has "committed themselves to this, and only this".

Both statements point toward the No true Scotsman fallacy. Your test of "committed themselves to this, and only this" is not a useful one, unless you are willing to clarify it. Does "only this" exclude drinking water? eating? talking to other people? writing LW posts? It is way too easy to move the goalposts to retain your vague assertion.