Good question. In the past, there have been some federation issues. However, things have seemed fine for awhile now. I will admit that it's entirely possible that there are issues that I may not be aware of. I don't do any extensive testing as I'm just a regular user, and /kbin is a younger platform which tries to do something different from lemmy and mastodon. If the Collections feature interests you, I might suggest just making a kbin account to give it a test run. You can essentially have the same feed you do now thanks to federation, but with the added benefit of feeds more suited to your interests. Public Collections are also very useful for discovering similar communities across the fediverse.