How much does bluetooth hurt audio quality?
When audio is being transmitted via Bluetooth, the audio is transcoded to another codec to be played back on the receiver. Lossy transcodes always hurt audio quality, however telling the difference between the source content and transcoded audio isn't as easy as you might think.
I settled on a Code keyboard with MX Clears. It's durable, useful and I'm happy with it. Sure I could upgrade but there's little to no reason.
Same with headphones. I gave up on all the fancy audio and use AirPods. Yes, they sound worse. Yes, Bluetooth hurts audio quality. But who cares?
For most of these hobbies the benefit you get from your first purchase will never be replicated. From there it's all diminishing returns.