Huh. I guess Facebook’s move away from including someone’s update or message in their notification emails had to do with more than getting you to go to their site...
I've been filtering them straight into the trash for the best part of a decade. It seems so backwards to send them when most people check their Facebook more often than their email.
Maybe I have, I'm not sure. Whatever I did to stop my inbox being flooded with emails from Facebook, I did almost a decade ago and I haven't touched it since.
Probably filtering them. Before I deleted my FB I remember it being a struggle to not have my inbox flooded. I would disable all the notifications and every few months when they updated their policies or changed the site those notifications would helpfully get turned back on.