Yeah, I noticed recently that my headphones have two modes - sound only, where they sound great, and wireless headset mode, where the sound is awful.

However, it's only awful for music. It's fine for voice, really. I only noticed the two modes when they got stuck in headset mode after I finished a call and I was wondering why the music I put on suddenly sounded bad.

OTOH, this list has made me wonder how much of the delay I hear in video calls is due to bluetooth. Cutting 300ms of delay is much more important than improving already serviceable sound quality.

I've also noticed in my case that bluetooth headphones interfere with my laptops wifi, but am not sure why. And the hardware bottleneck makes a lot of sense for me because those headphones didn't interfere when weren't connected to the laptop (the same happens to me with my phone)

Same, except it's the other way around - my wifi interferes with all audio bluetooth devices I've tested. It causes a stutter about once every five seconds that goes away as soon as I disable the wifi.

Fortunately, it only happens when I'm connected to a 2.4ghz network so I was able to fix it by switching to 5ghz - but even with the modem in the hall outside my office, I'm at the extreme limit of 5ghz reception. It really does not travel far.

Ended up with the same setup.

Qc35 + Razer seiren mini work great together.