If anything, shouldn’t it be encouraged, and even automated? I’m including even the ‘old’ stuff from reddit here. Reddit shouldn’t be the absolute owner of the content submitted by users. When I migrated here, it wasn’t because of me being against reddit users, but being against reddit the company. Copying the content here actually hurts the company in sense that they don’t get to then gatekeep the crowdsourced content.
People think Lemmy should be Reddit, but when Treads Federates it will be something very different. I fully expect that Threads users will very quickly subscribe into LW communities and thus we will be something much bigger than reddit ever dreamed.
Threads may or may not federate with Mastodon. It has not announced any plans to mimic Kbin and handle Lemmy as well.