Slippers don’t last forever, but they’re still worth paying for. Really good slippers pay for themselves by keeping your feet - and you - warm enough to turn down the thermostat. Seeing that return depends on how much your heat costs and how cold your feet get.

Wool slippers tend to stink less and last longer than synthetics, and wearing socks will keep them from smelling for longer.

Haflinger makes several models that have different soles. I wear the Grizzly with cork soles because I live in a place with hard floors, and I wear through thin rubber quickly. They last me 5 - 7 years.

Alternatives:

Gottstein Magicfelt with leather soles are light, but the leather soles aren’t as warm. I use them for travel.

Birkenstocks with socks. Require cleaning as they will smell over time. They do stink over time, but it’s less pronounced with the tradition firmer model.

If you’re in the US, LL Bean wicked slippers may be good enough, but leather is less breathable than wool, so they could get gross.

No shoe is truly BIFL. You can get a lot more wear out if them by rotation in a second pair to allow them to dry between wearing.