I've never understood how or why this is an issue.
Shortly after Spez's petulant AMA, I ran across a link for Lemmy. org. It looked interesting, so I followed it. I poked around a bit, and it still looked interesting, so I picked an instance and created an account. I played with it a bit, then I went back and found a different instance that looked interesting and created an account there too. And I just kept reading and posting, just like I'd done on Reddit (and half a dozen different sites before that). Some instances came and went and I lost some accounts and created others and eventually settled into a few that I like best, and just read and posted and didn't leave. The end.
But it seems that every time I turn around, someone's going on about the hardships of moving to a different site and all the difficulties to be overcome and yadda yadda yadda, and I just don't get it. At all.