Maybe the particular CA-series you owned was a lemon? By now these amps are 25+ years old, and those that made it this far are probably neither more nor less reliable than their peers.
As you correctly point out:
The old Classe CA series amps were wonderful sounding and extremely powerful.
That’s the salient point here. OP would be hard pressed to buy a modern amp that came even remotely close to the sound quality of his Classé with what he’d get from selling it minus what it will cost him to fix it.