Not my experience.
I have a Simaudio W-5 amp that I bought used that was 10 yrs old. I have had it close to 2 years and keep it turned on (per factory). Not one problem Was driving Dali Mentor 8's and now SoundLabs M-1's. The original owner of SoundLabs has CAT mono blocks and was impressed with not only my W-5 but also another SoundLab owner using the same amp. It's not a CAT but it's far from bad. And there's one for sale for $2200 on the Agon right now.
I have a Simaudio W-5 amp that I bought used that was 10 yrs old. I have had it close to 2 years and keep it turned on (per factory). Not one problem Was driving Dali Mentor 8's and now SoundLabs M-1's. The original owner of SoundLabs has CAT mono blocks and was impressed with not only my W-5 but also another SoundLab owner using the same amp. It's not a CAT but it's far from bad. And there's one for sale for $2200 on the Agon right now.