If the secret to immortality was discovered, and you could live forever, would that actually solve your problem of "make all the things, for infinity"?  Like, does having an infinite amount of time actually permit an infinite amount of "things", or do the two infinities just sort of converge at some point and you end up with something inbetween everything and nothing?  (also do you even think along these lines, sorry if this makes no sense)
it would solve some problems and probably create entirely different problems