Personally I’d sometimes appreciate it, especially from Lemmy to Mastodon. Sometimes I find something interresting or useful on Lemmy and I’d love to just boost it on my Mastodon. The way it’s now is that I post the link to Lemmy post on my Mastodon and this isn’t nice, f.e. now I have two comment sections (one on Lemmy, one on Mastodon) and if people on Mastodon want to join Lemmy discussion, they need to have Lemmy account.

Also the other way arround (from Mastodon to Lemmy) - sometimes I see screenshots of Mastodon messages. It shouldn’t be like that, we should share the original post directly in Lemmy which would credit the author and we could join discussion

Edit. But btw this is already working … sort of. In a very, very limited way. F.e. this is how I see this post in Tusky app with my Mastodon account. No image, no comments, it’s … meh. I think you can somehow join the discussion too or just reply to a single comment but again, it’s very limited atm