Hive has evolved quite a bit indeed. The Ninja-mined stake was a big burden back in the Steemdays, that's for sure. It had big letters on it "security risk". I'm still amazed and impressed by the whole community, especially the big guys who made things actually happen: shout out to these main figures who played a big role.
Even though we've repelled centralization, and made it more difficult to have a hostile takeover, centralization starts with a big movement from 1 or a few individuals. I guess my biggest concern /fear would be that people respond too emotionally in situations where we should respond objectively and if required; put our differences aside.
I'm also concerned about bad actors who create "dummy" dApps, with fake transactions, to overflow the network. I believe this was seen on EOS a few years ago, the entire network was frozen due to a fake airdrop that responded quite heavy on network usage.
If users stop using Hive, I think Hive might go deflationary on its own, wouldn't it? The With the reward-pool not being distributed completely, and blocks keep on being produced.
Oh well, I'm not seeing this happening anyway.
PS: you need to hit that ENTER bar a bit more often lmao. I had to format it in word xDDD