Can anyone explain in laymans terms why your gear sound better after warm up

I hate to judge before all the facts are in but tube electronics are also apparently subject to variation in temperature, at least in terms of warming up. That’s the way thing are.

I look at it as a performance cars, they perform better after they’re warmed up.

I'm an electronics layperson. Al's response was crystal clear to me.

As you can see above, even engineers debate this. We have many possible theories, but no actual definitive answers, because no valid testing has (or will) be done. Its completely and costly.

But there  are many possibilities:

1. temperature consistency
2. bias consistency, depends on above
3. capacitors "forming"

Among many others. I can watch the bias move around greatly during warm up on prototypes under development, and I can also watch the noise floor fall - for both known and unknown reasons. So*something* is happening, I have my theories.

I'll leave this brief.

G