PS: I stand corrected. https://www.telekom.de/unterwegs/tarife-und-optionen/smartph...
They do offer them now
I don't listen to DAB radio anymore in my car as it's mono and sounds awful, I use the various radio station apps and have far fewer drop outs than with DAB to boot in addition to the far greater audio quality.
Looking at my usage for the last month I've used well over 50GB.
Home broadband tends to be unlimited as well, I'm on a 384Mbps down 37Mbps up cable connection and regularly transfer 2TB+ in a month when working from home, and nary a peep from my provider.
Just looked at my home internet stats, that connection alone had 115.42 GB of download traffic over the past 5 days.
They have a fair usage policy but don't enforce it (no idea why) and chatting with their pricing personnel it makes no economic sense (they lose money on it). It would appear it's a sacrifice they are currently willing to make to ensure market share increases.
One example: https://tuki.dna.fi/org/dna-en/d/dna-rajaton-prepaid-support...