I maintain a Yahoo.com email account but I'm not sure why. I have Gmail pick up the mail using POP and that's where at least 90% of the emails in my spam folder come from.

I guess I worry about there being something out there that I used long ago and want to retrieve. And they started recycling email addresses: https://celeretech.com/blog/yahoo-begins-recycling-e-mail-ac... So there was the fear that somebody else would take over your old address.

That was a long time ago (2010) and they reversed direction but there's nothing going on with Yahoo that makes you think they won't do it again.