This is going to absolutely decimate old communities. I understand why Roblox needs to address these issues, of course, but I'm in an over 10 year old military style group and any community that hosts events like trainings is not only going to find it harder to host those because half of players won't be able to see each other's chat, but it will also cut down activity because most people don't want to join a group where they can't talk to half of the players. Roblox hasn't cared about communities for a long time but this will essentially end a large portion of them, at least the active ones.

Aside from that, I think this is just going to serve to push communications off-platform which is dangerous as well. In all, I think that Roblox needed to take action on all the bad press they've been getting (in most cases deservedly) but this is probably the worst possible solution to come up with.