yeah, but lemmy users won’t need to tag the community, so it works okay for one-way communication with the original poster being on mastodon and all the repliers being on lemmy.
it’s also a good opportunity to teach lemmy users the importance of regularly clicking the rainbow fediverse icon to check if they’re missing anything that hasn’t federated over.
speaking of sinking ships, I’ve been waiting 3 years for that to happen to discord, yet it still seems to be alive and kicking 🤷