EU legislation on power chords gave us micro-USB phones, when USB-C could have been a better option, but a real solution would be let consumers decide inputs/outputs.
Regular major and minor chords were unaffected though :)
(I actually started reading this comment as a pun, as in "The EU can regulate music streaming - they already regulated power chords", and that made me smile)
When trillion-dollar companies consider a serial connector to be a proprietary and DRM-enabled apparatus I think the "real solution" is precluded by entirely unnecessary corporate greed.