Any thoughts on the importance of transconductance tests when testing tubes?

[Tubejunke]

I have a couple of Hickok tube testers that have this function. For the most part, I have always ignored it when testing tubes and sticking with the pretty standard emissions and shorts tests. Lately, I have been studying the concept from a great old Electronics textbook, and it seems like it would be rather important. At least you are a person having concerns of picking the best possible tube for a special application out of a number of the same stock.

I think old radios and TVs have enough tolerance in their circuits that if a tube is clean of shorts, has no gas, and bears good emission than the work of the circuit will be done with no noticeable effect to the user. Am I right? Figured I would get lots of good insight here.