Before April 2025, Core nodes represented 95%+ of all the network nodes and almost all of them ran default policy capping OP_Returns at 83 bytes. I am also old enough to remember that Core proposed to make adjusting the datacarrier size not possible in future versions of the software. So what do you call a 1200x default change to a standardness limit and then remove the ability for people to change it? I call it a de facto consensus change, even if technically isn’t.