It's not. It's expensive, noisy, takes a long time (6h door to door) and is uncomfortable as fuck. I recently had to go to Edinburgh. It was £235 standard class to get a train that takes several hours. Or £80 to get a plane that takes 2h door to door (1h in the air). If I want to go anywhere in Europe it's quicker, easier and almost always cheaper to fly. Even on a bad Lufthansa flight where everything goes wrong :)…
You must be having noisy nights at home to enjoy 2 hours door to door travel by plane. The state of the train network is terrible so it should be used as a bad example. Trains are longer but for most people they are more comfortable physically and mentally : more space for your legs, your luggage and less hassle going to the station and passing controls. Night trains are not perfect, but with earplugs they can be ple…
As for the trains, no. Standing up with a suitcase between your legs is not uncommon. I prefer Ryanair to that.
When I travel by air I have hand luggage and that's it. Maybe if I do a couple of weeks away I'll have a small suitcase as carry on. Don't pack the kitchen sink.