There has been no announced plans for changing the way OAuth tokens are required in Helix.
Ah, that’s a shame - thank you for the prompt reply!
If a user has previously authorized your app, you should store their User Access Token and Refresh Token if you plan to use Helix endpoints that require that authorization.
I do - however I have to process in a serverless environment, which is why EventSub and App Tokens in general were really just a hugely beneficial thing for me (As to not have to spend extra time fetching their token, decrypting it, running the request, refreshing the token if it failed, rerunning the request, storing new refresh token if needed, and so on)