I get that it's not ideal and that adapters are awkward but it seems like it's such a minor inconvenience for your use case. I would expect that audiophiles are used to adapters to go between 2.5mm, 3.5mm, and 1/4" stereo already. What's one more?
And yes, I really do prefer what I already have (my headphones working without a dongle).
Edit: I'm not even an audiophile btw
Don't have one.
>need to plug them into a TV or game system
Don't have either.
You're completely right that I need adapters but that doesn't mean I'm ok with getting increasingly more of them. Especially when I get nothing out of them except backwards-compat for hardware that is simply not of the legacy type.
Adapters are easy to forget at home, lose on the go, break, etc. pp. They're detrimental to the user experience and hence should be restricted to support of legacy hardware.
What's your criteria for when that future will have arrived?