A car gets you where you want at the time you want. Whereas a train gets you close to where you want to go at some time.
So better depends on what's more important to you. If you take a look at ecology, sure, trains are far better than a 1 person in a car. If you look at flexibility, cars are far more better.
I think you are talking about convenience while they were talking about ecology.
- you can pee anytime
- you can choose different class without changing materials
- you can book as much tickets for your whole family and kid's friends. Everybody will travel together, no separate cars, no additional drivers
- and my favorite : you can enjoy your ride with meditation, work, movie...
edit:formating
The return leg was far better.
Getting the sleeper train means hanging around in some dingy third-rate terminal waiting for it to leave. I didn't really sleep on the train, because even though they run it slowly, it's still pretty loud and bumpy. I shared a cabin with a well-behaved friend, so i wasn't even mixed in with strangers. Changing trains in rush hour was not fun. In the end, it took me long enough to recover in Barcelona that i could have stayed over in Paris, got a TGV that morning and not been far behind.
Whereas the TGV back was a TGV. Comfortable, nice scenery to look at, decent bar for a train.
If you sleep more heavily than i do, or if there is some real value in being at your destination earlier in the day, a sleeper might be a good choice. But in the age of high-speed rail, i don't think it makes much sense.
With a full car, the environmental and certainly economic argument for the train is gone.
I have used about 5 night trains in recent years. I don't sleep very well, unlike my Russian colleague who grew up with this, but they have all been more or less on time.
To approach this from a different angle — we have a euro7 norm that has been brewing for quite some time now and we still failed to come to an agreement. And there are talks now that the norm should also include production of EVs, electricity production and pollution from degrading brakes and tyres. Which is again stalling it even further.
So the reality might be that 2035 ban will be pushed further into the future as the date comes closer.
What should have been 6-7 hour car drive was ~12 hour train ride. Sleep was not great, getting to and out of train stations, herding two small kids etc so at the time we've reached our destination we were pretty tired. Much more tired if we just drove.
The route back is where things went south. One of the beds in our cabin fell apart. Then there was some sort of the outage en route back so the train had to skip our station and we landed almost 150km away from our home.
Train company was trying to get us on the bus or train to get us back home but there were no free seats so it looked like we were to spend a night there. In the we've decided to take cab back home. We should have been back home ~10 in the morning. When we got home it was close to 6pm.
On top of that bathrooms were super dirty and there was no running water in the sinks.
We've paid ~700 euros for both ways and additional ~150 euros for the cab. If we just drove the whole round-trip would have cost us under 100 euros including lunch on our way there and back.
I just don't see this as an alternative to driving or flying in Europe — they are too expensive and the level of comfort they offer for the price is just horrible. Even if everything went according to the plan and our route back was without any hiccups driving would have been much more convenient.