Lots of things, I’m sure.
Golf. I used to be pretty good and would watch a fair bit on telly.
Nordic events. I still like to go cross country skiing when I can, but used to watch it religiously every weekend as well. Haven’t watched a single race this season.
International football. Haven’t watched a full Norway game in ages, I’m just not interested. Will be watching the Euros, though, even if Qatar caused significant harm to my interest in the big tournaments too.
Films, to an extent. I was never the biggest film buff in the first place, but would always watch at least a couple of films a week at home. These days I might go to cinema twice a year tops, and at home I only watch Disney Pixar stuff with my son.