Signal, Wire, and Jami all support group chats that are E2EE. Discord’s reasons for not doing it might not be sinister, but they don’t need that level of access to your content in order to provide their core service.

Great policy. Misogynistic, racists, liar will say anything for attention, tho.

As long as they can get tzdata / Olsen db updates before the first change, there’s usually no problem. But, I’m sure there are still devices out there using the OLD US switchover dates from the Bush era, because they have a different, possibly “hard-coded” rule set.