This matches my experience as well. I rarely if ever get sent to a spam folder. And afaik, I've never been blacklisted after ~5 years.
The only clue I have so far is that in some discussion, it was mentioned that google penalizes a domain of a lot of different emails from it get forwarded to google - and I do have my catchall forwarded to a gmail box.
We now live in a world where google can make you and your communication channels disappear, and they don’t really answer to anyone.
Still, that's probably way over the home email setup threshold.