Currently, there are some alternatives, or bluetooth versions which work pretty well.
Often wireless gaming brands offer a usb dongle. That dongle often uses a proprietary protocol over 2.4ghz. And allow enough bandwidth for audio and mic. Some brand give more or less bandwidth to the mic, or have better compression, or bandwidth.
And currently, there is a fairly “new”, already here since bt 5.3 : LC3. It’s a very well optimised protocol which allows for about the same quality at lower bandwidth than other protocol. It also has lower latency. This protocol has started to be used by gaming brands, like Creative, in a usb dongle. Or even in standalone headphones. On the Creative headset, it would allow enough bandwidth for audio and mic without much compromise (like if it wad a proprietary dongle).
Obviously the quality may not be as good as wired. But it should be enough for most people.
Huawei also seems to have announced (not sure if yet released, it should be in an honor phone), their bluetooth competitor. They say 6x faster (more bandwidth I guess) https://newatlas.com/mobile-technology/nearlink-wireless-huawei/.
