I subscribed to the communities I care the most about and sort by subscribed and new. That said, across 20 communities it’s probably something like 10-15 new posts per day so after I get through those and interact it’s off to all.
But I do try to engage in the communities I want to see grow.
We have a similar vintage 55" Toshiba TV. It would be nice to upgrade, but it’s hard to argue with something that’s worked so reliably. It’s also nice to have a decidedly dumb TV…