>I use a tracker to try and fight this, showing how many games I've started and also achievement progress in them in aggregate.

I've tried something similar before and it worked, for a while, but I started feeling the free time I spent gaming at best felt like a chore and at worst like a job. Nowadays I just play what I feel like and don't really bother much with completing games or not, because realistically I never will finish my backlog.

also very reasonable. there's no sense doing any of it unless it's enjoyable, and "getting your money's worth" out of a book or game you just aren't liking is a bad consequence of caring too much for the sunk cost and etc

> But I also buy a lot of books I intend to read later, so I almost think it's inherent to digital copies?

Nah, it also occurs plenty with physical copies. Look up tsundoku.

What tracker? I need something like this, I've around 1600 games on steam and need a way to keep track.

There are others but http://completionist.me/ works the best for me. Shows the averages and also has things like "this many games are under 5 percent completion" so I can go find something I booted up once and forgot about.

I also use steams category system to then tag some of those into a backlog category, although that doesn't help as much