Now that’s a more useful map - trains you can really ride on now !
(cf previous map of TENs - about european project funding).
Indeed I have taken many of these routes.
It’s great if you live near hubs like Praha, Wien, Stockholm or indeed Lviv.
However there are so many gaps which existed not so long ago. For example I remember the hotel-trains across Spain from Irun to Lisbon and Algeciras (for Maroc), nightly trains Bruxelles-Luxembourg-Basel-Milano and Bruxelles-Warszawa, also Villach-Belgrade. Going back even further I even recall (London-)-Ostend-Moscow and Thessaloniki-Istanbul.
So I hope some of these will come back again, and/or go longer distances in one night using high-speed lines (as in China).