Well I haven’t broken mine yet 😀
It was making an odd clunking sound a couple of years ago, took it to bits and the pushrod had dropped off the end of the air cartridge. Bunged that back on and it’s been fine ever since.
The linkage has nylon top hat bushings not bearings – I can’t detect any slop at all in mine, they’re quite hefty, but would be pennies to swap if they wear. The main slider has a grease nipple on it, very easy to just bung some in there occasionally.