A coworker and I both replaced almost every incandescent we had with cheap Walmart LEDs [1] about three years ago. That was 26 bulbs for me, and I believe quite a bit more for him.

All are still working fine for both of us.

I went around after installing them and measured their light output. A couple years later I went around and measured again, and there was little or no detectable reduction.

[1] they were a particularly good deal because the electric company here and Walmart had made some sort of deal that marked the 60 W equivalent and 40 W equivalent bulbs down to $0.17 each.