One of the problems I see is that now anyone that was using intercooler is using an outdated and quite likely to become unmaintained library and be forced to migrate/rewrite things.
Yes, I wish the author will offer a smooth upgrade path for the existing intercooler.js users, because my heard wants such a thing to be adopted by people. I like the concept very much!
Would have had the same problem if the rewrite was called 2.0 instead of htmx. Hmmm, reminds me of the Angular 1 vs 2+ conumdrum (for which many said renaming would've been better).
See above. Intercooler will continue to be maintained.