@PureTryOut @boredsquirrel yep, exactly. Which is kind of the whole point of the Fediverse, that posts can be exchanged among different services like Mastodon and Lemmy. Though sometimes a bit of information gets lost in the process because of differences between the services, like (apparently) attachments.
@arran4 @voracread With some specific packages there are conflicts between different versions, so you can only have one at a time installed even if they have different slots. I think a few of the core KDE packages are like that. I know that I had to remove some parts of KDE 5 when I installed KDE 6 on my Gentoo system.