[andrewshadura]

In France, some destinations are served only by TGV. In Italy, taking local trains can take an eternity.

[riffraff]

but with interrail the "useful" thing was to travel overnight, because that saves you one night of $$ for loding, so slow is actually fine.

I don't think fast trains (TGV, Frecciarossa etc) were ever covered by the interrail ticket anyway, were they?

[andrewshadura]

They are covered, but you need a surcharge or a seat reservation, or both.