Hope it stays solid for you now. There is no justified reason to have to power cycle/reset as that would imply a hardware or firmware fault and I don`t think BT would admit to that.
I ran for months without a reboot on old HH3 and HH4.... HH3 had some issues if you tended to use wireless but never had that issue with HH4. HH5 - I am a bit new to that so couldn`t really say in an informed way yet.
Anyhow yes looks nice and stable now as it should be, hope this is the end of your happy trail with BT