Guys, do I have a temperature problem?

When I was a heavy equipment mechanic, there some thermostats that seem to need a "warm-up" themselves before they start to regulate more around their specified opening temp. Usually, the overshoot was minimal (~5*)
This said I think there is a point when this behavior is pointing to a sticking/ failing/ crap t stat. I just recently went through this with the thermostat in my pickup (6.7cummins). It was a 190* t stat and was wanting to stay closed until 210, new thermostat solved the issue.

Curious to see what others have to say as well.