I think it’s not even about shadowbanning, I think it’s about Twitter not giving you anything to interact with (a discovery mechanism). Reddit/Lemmy has a list of subreddits/communities that have a clear focus, so you can jump right in and engage. Neither Twitter nor Mastodon have that. There, you need to find people who generally post/share things that interest you, but that’s a lot more difficult.
Yep. I’ve been here for one day and I’m already talking in conversations. Took me two weeks to get anywhere on Mastodon. (And exactly the same on Reddit and Twitter before… the incidents.)
The stated problem is actually more pronounced with a larger number of parties than 2. If the governing party is strong, but doesn’t have majority, and the opposition is split, they usually need to trade favours with the opposition parties to get anything done.