As a kid I went on skiing camp which included a night train from Belgium to the south of Switzerland. I liked it back then but sadly flying (and even driving)

As a kid I went on skiing camp which included a night train from Belgium to the south of Switzerland. I liked it back then but sadly flying (and even driving) is faster, cheaper and offers much more flexibility. I would definitely consider it if they could offer high-speed trainings like I use to go from Belgium -> France.