[pepoluan]

Can be mitigated to a degree by separating the (cheaper) sensors and the (pricier) logic.

But then it will become a tradeoff of complexity vs longevity.

[lazide]

Nah, because it would still need servicing.

And why? There are reasonably well done, low maintenance, temperature balancing valves out there.

And they do typically last 20+ or more years.