Warming is not so important in case of solid state amps. Even from a purist's point of view, I do not see which components in a Solid State amp would need 'warming'. Capacitors? Given the speed of flow of electrons it would take a few nano seconds for these components to 'warm-up'.
Power conditioning is more important.
If any component in the system needs warming, it has to be mechanical/electromechanical parts. Speakers! That's why there is a run-in period.
My £ 0.02