Well, you can theoretically make a second app-view “instance”, call it “Greenearth” or something, and have different policies than Bluesky on how to verify or select content. But until someone actually does so, it’s not really decentralized. I’m not sure what’s stopping people from doing so, but it’s been a while, so I assume there must be some roadblock.
There’s also the issue of how Blueky itself was depicted as the decentralized network - when it’s more akin to a single instance, instead.
Sure, it’s always a step of 10x, but you do have to remember all the prefixes. Or you can only remember the 1000x prefixes - but you also need to remember centi-. Then, nobody says “megagram” - it’s “ton”. So there are quirks to remember.