To the point raised about Trulli trains and tracks where overtaking is impossible. Surely if you have enough of a speed differential to lap a car you’ll have enough of a difference to pass them? And surely we shouldn’t be racing at tracks where overtaking is not possible even if there is a massive speed difference.
These same tracks are used by all sorts of formulae, many of which are for spec cars which have very little speed differential - funny how most of them have very little trouble overtaking.
Maybe there is a clue in there somewhere!