TT or T on type boils down to experience, the problem is that for some 10 years is no more than 10 x 1 year !
What experience should teach us is the same thing (most of) us learnt as kids if it hurts don't do it again, of course there is limit to the trial and error approach of learning whilst flying.
I personally think route experience is far more relevant when dealing with the threats say from the non radar environment of the Greek Islands on a busy night with TS activity