for the Reddit refugees, do you also feel a bit heartbroken?

No. Sites and communities come and go. Before Reddit, I was on slashdot and would occasionally use others like kuro5hin, fark, etc. Reddit had a lot more going on and was much better for comments when it came along. Then it got huge and only the small subs were any good for a sense of community or discussion. For a long time, it’s mostly been good for doom scrolling outside of some niche hobby subs. If anything, it’s kinda nice that some people are motivated to try other things like lemmy and kbin.