If I am reading this [1] correctly, regular Bluetooth >5.0 offers transfer speeds of 50Mbits/sec, while Bluetooth LE offers 2Mbits/sec. Does Bluetooth LE even solve fundamental problems like high quality bidirectional audio?

[1] https://en.wikipedia.org/wiki/Bluetooth#Specifications_and_f...

I never knew about the 50Mbaud figure, is anything above 10M even achievable in a real world scenario?

It does solve this by having a different topology. It supports a configurable number of streams in each direction, so at least in theory 5.2 surround with a stereo microphone should be possible, we'll see if it's usable

It also supports what is often called 'true wireless' earbuds by default, as each audio sink can stream only the channel it's interested in.

Finally there's all that broadcasting stuff, which works fine in our tests most of the time but also with a myriad of issues, some of them in the spec, others in the Android implementation, which is currently the de facto target to support