Hias, thanks a lot!
However im wondering due to experimental status.
I hope, Beta 5is the last before LE 10
RPi4 code is still under heavy development, with new features and bugfixes coming in at a quite regular pace, so RPi4 builds should be considered stable-beta even if LE 10.0 final is released (as also announced in the blog posts).
The recent kernel update was quite a disruptive change, not only adding 4kp60 support but also switching the internal audio driver code, so any feedback on nightly builds is highly welcome. I'd expect future kernel changes to be far less disruptive, more focusing on ironing out remaining bugs.