Good public trackers were shut down. Getting into decent private ones is a huge pain, if you even manage to get an invitation/interview. Some trackers aren't compatible with *Arrs (due to Cloudflare). Seeders and speeds can be awful, and keeping a healthy ration isn't easy for some. If one is willing to pay, Usenet is a great alternative. I run both to cover most ground, but mostly rely on the latter now.