Yea, that's fine, I see where you're coming from. There's a distinction between blockchain and the apps build on top of it. All I'm saying it: Steemit is a blogging platform which is one of many apps built on top of Steem blockchain. Even if it dies, Steem blockchain itself might still live on as long as there are witnesses.
Actually, if it dies, it would be the first flagship app that dies before its flagship blockchain. You probably could build a charity app (plus blogging) on top of it to replace Steemit. Steem ecosystem should stop evolving just around Steemit if it wants to survive against newer/better blockchain.
Yes, and actually I think Fundition is that app right now when it comes to charity on the blockchain ... though I'm not predicting Steemit going anywhere. We'll see.
There is still Busy, Steempeak, esteem, etc. providing blogging dapps. But I think steemit is the only one that consolidates content from all of the steem dapps, except steem monsters. (Do Steemhunt posts show up on Busy?) So would be good to see that function continue to exist.