This doesn’t apply to the SA10 or any of the more expensive CDPs, but the second CDP I ever had was a Carver vacuum tube CDP that I bought in '94 and used standing alone and then as a transport for an outboard DAC. Anyway, it was in my system for about four years, getting most of its use on weekends, and then it started doing goofy things--skipping, getting stuck, etc. I assumed this was related to the laser/lens. Then I bought a Rega Jupiter (top loading) dedicated transport and it lasted and lasted. I put my system in mothballs in 2010, but when I brought it back out near the end of 2017 the Rega was working fine, and in 2020 when I bought my SA10 it was still working.