Oh I think it definitely did damage, just not enough to kill such a massive platform overnight. Twitter has lost a significant amount of users while other social networks grew or held steady, and the cultural impact seems to have waned a lot.

I've never been a regular user of Twitter, pre or post elon era, but a lot of people I follow in other ways used to be very active on there and discussions would often spill over into other venues. That still happens a bit, but much less than before.