I like the different approach some games take, like Minecraft’s “advancements”. They’re per save, so mods don’t disable them (in fact, many mods add their own), and a nice indicator of how much progress you’ve made in a world already.

And people who care about “completing” a game can still do that in a single save and show off the advancement progress window there (although it can be cheated just like in any game).

There’s just no global statistics anymore.