I am running my Lyra Atlas - it is maybe a total of 14 - 1500 hours by now.
No major problems. The bad spots in my vinyl collection are like before (mistracking, sibilance).
It has become more "slack" than in the beginning, as is to be expected. Mainly it works to the best, sonically (a bit more more rounded, mellow, ambience-tuned, dimensional).
Michael Fremer got problems with the Atlas after four years - his copy was bought in 2013, like mine. But he described "heavy usage". I suspect this means 2500 - 3000 hours or even more. At that point he heard clear signs of wear, especially, more sibilance. So far, this is not a problem on my cartridge.
Generally, yes, the Atlas is a big investment. But I have never looked back.
The Atlas goes so deep that the woofers can pump (subsonic movement), at least in some arm combinations with low resonance, like my SME V. Yet this usually means good sound, it is not very serious, in my judgement so far. See
https://forum.audiogon.com/discussions/why-are-my-woofers-pumping