@PGLux @goatsarah @jon I've always had mixed feelings about it. The big advantage of HSL would be to connect to Spain. Inside PT, I don't know how much we would gain from Braga (or Valença) to faro with HSL vs Alfa, assuming both the HSL stopped in Lisbon and Porto (slowdown + speedup + few minutes on the station), and Alfa actually goes at the speed it was supposed to…
(Re-)building trains on locations that are missing might be more effective to get rid of 🚗 as first (and often only) option.