Not really sure if that is the case. Every now and again I get notifications of postings from threads that were inactive since 2015.....Oh good
If you aren’t active on a thread, then after a while the alerts stop (thread does stay in subscribed), which is kind of nice, but also annoying sometimes when stuff gets missed.

I only started in 2014 BTW. Occasionally I scan thru some of those early threads when I have nothing else to do. ( those from my day 1)
