The things the gene gun can do turn out to be not the most useful things one could hope for from it. (It's a surprisingly brute-force device, though I guess that was all in the name if you actually took it at face value!) I don't see a ton of future for it as a generalist technology, though what things it does well it does very well.

CRISPR is... awful in different ways. (It seems to have a lot of trouble controlling how much material it transfers.) It's a laboratory curio or one-off stunt now, but I fully expect it will improve.