Almost all of the blockchains that exist today are NOT decentralized.
These "Dapps" are Centralized web applications that plug into distributed blockchains with peer to peer transactions.
What that means is these applications have a distributed database, they are NOT decentralized by any stretch. But they do not have a single point of failure. For example if a harddrive containing the database crashed, or there was an earthquake near that reduced the infrastructure to rubble, it would still exist because the database is distributed across many different computers in the network, across many different geo's.
BUT, this does NOT mean it's decentralized!
For example, if DLive was decenralized, do you think they could just pack up their bags and hop chains overnight like they did??
This is one of the reasons I'm planning to spend less time posting on steem, and more time posting on Instagram and IGTV.
Because they are both highly centralized, so I might as well post on the platform with a ton more people so I can build a much bigger list of followers. That and the people here are afraid to disagree on anything because they might impact their future earnings. It's kinda like being surrounded by politicians which I hate.
Anyway, that's a bit of a side topic, more on that in the next post...