An improvement for who? Considering that bluetooth is used extensively to track people, I wonder what this will be used for. At this point I'd really like a laptop without any radios at all, or at least hardware switches to keep them off.
Will be? Thread radios exist in all of their Apple TVs and HomePod Minis and have for years. Thread is nothing new, nor is it secretive. It's internet capable 6LoWPAN over 802.15.4, nothing more. The average Mac spews more information while connected to a regular Wi-Fi connection by default for mDNS/zeroconf.
I will agree though, that hardware switches for these radios, even if unergonomic (say, only accessible on the logic board), should be there.
FWIW, this feature is common on older thinkpads. I really enjoy having a switch on the outside of the laptop to quickly toggle the radios, its a shame they're totally absent on newer laptops.
An improvement for who? Considering that bluetooth is used extensively to track people, I wonder what this will be used for. At this point I'd really like a laptop without any radios at all, or at least hardware switches to keep them off.