It's a very good question. I haven't really tried using salsa directly, but I know Adam Perry spent some time with it. I believe an earlier prototype of Moxie actually used salsa, but he ended up moving away from that for reasons I don't fully understand myself. In any case, Crochet is very deeply inspired by Moxie, so there's certainly an influence there, even if we don't end up using the code directly.

Regarding DOM, yes. I think it's held up pretty well considering how long the ideas have been around. It's slow, it's clunky, but it gets the job done. But I also think now is a good time to consider better ways to implement its core functionality, which is tree mutation.