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Like SilverBullet, I can't recall ever reading about a CCT failure on a 2014 S10...
Mine failed - but it's likely I caused the failure somehow unwittingly. It worked fine, I took everything apart for a valve check and re-set the CCT. When I put it back together, it was noisy, so I took it apart and re-set it again and verified everything. Next start was it's last as timing jumped a few teeth.
I now have a Graves manual CCT. For the cost, peace of mind, and ease of install, it's a no-brainer, IMO. If I end up with another S10, I'll probably do it again. Once bitten...
That said, I think there are few actual cases of CCT failure, and the noise it makes before dying warns you to get off your butt and deal with it. Ignoring that noise for a long enough time is what leads to catastrophe.
AFA longevity, everything wears. At some point every seal, bearing, gear, and valve will need to be replaced. I think if you run normally and keep up with scheduled maintenance, it will go forever, like a two-wheeled
Ship of Theseus.