I think the slow trains in France are a bit better. They are in Germany, I've got around by train fairly easily there. You can even generally blag on to ICEs with no bike spaces left if you take wheels off and put your bike in a bin bag. I've seen people doing that on the platform in France too - just it's different rules for each TGV line.
But flying is 100x easier to plan. And forget trains if you want to go east of Slovenia.
I think the slow trains in France are a bit better. They are in Germany, I've got around by train fairly easily there. You can even generally blag on to ICEs with no bike spaces left if you take wheels off and put your bike in a bin bag. I've seen people doing that on the platform in France too - just it's different rules for each TGV line.
But flying is 100x easier to plan. And forget trains if you want to go east of Slovenia.