Constant tweaks for the sake of justifying jobs when, finally, the essential functionality is broken so that someone else can fix it in a different way next year. Churn-oriented UX and swe. I already set Settings > Accessibility > Display > Reduce transparency to On to proactively refuse to participate in this pointless UI glitter.
And this probably was one or two man just having fun writing shader for the refraction on edges. Someone saw this, made it as biggest feature and cult goes on.
All that while I can’t connect from macOS to iPhone's hotspot, because I split family account while MacBook wasn’t powered on. Bugs growing, but shiny stuff making big money from few FTEs won.