Reminds me of how wireless keyboards and mice often don't use BT despite it being totally designed for that use case. They use some random 2.4GHz USB dongle. And well there are BT kbms, but they're unreliable.
I actually love Bluetooth mice and keyboards, especially when they support multi device so I can switch between my phone/laptop/watch with the press of a button. Currently using [0] for a few years, love the build quality and form factor. Then a random Microsoft BT mouse. No problems with reliability.
My Apple BT keyboards+mice run out of battery very quickly and sometimes randomly disconnect/reconnect. A newer non-Apple BT keyboard seems ok on its own, but then there are issues on the other end. My fairly new Windows PC can't wake up from Bluetooth keyboards/mice, so I have to keep a USB one attached. And the BIOS menu requires a USB keyboard too. Dongle eliminates all that complexity.
There are also some BT limitations at play. Key rollover is capped, and mouse polling rate is lower. But that'd only matter to me if I were playing PC games. Ability to switch devices is a plus for BT.
