What subsequent developments? It sounds like you are alluding to the DMA.
The DMA is an attempt to reclassify what “market” means in the modern age where we have a global tech oligopoly. This is because a simple “test” for monopolism doesn’t work in this world of multinational megacorps.
Again, your complaint is a double standard. You are doing similar in the USA - albeit without an actual structured act - as per the recent rulings on the Google Play store.
The EU has simply codified the rules for their vision of the future where people aren’t beholden to a handful of tech overlords, whereas the USA is making similar incremental “changes” through case-law. I’m not saying either way is correct, but it seems like they are both headed in the same direction.