Friday was coming home from work and noticed the rear cassette was not moving to the smaller cogs.
Initially though it was a cable stuck somewhere or needing a tune up. Got home and while trying to tune up the cable snapped inside the shifter.
It was surviving on few threads and probably was stuck itself and not shifting to the smaller cog.

I think I had around 3.5k to 4k miles on it.
Is that around the expected life? I've never lubed or anything inside the shifter body.