This is one of the best posts on the entire tron/steemit subject that I've seen so far. You touch on all of the important issues and potential situations.

The one thing I want to comment on is the part about running Steem nodes being expensive. For $50 / month (or possibly even a lot less) you can set up a Steem node which will do everything you need to run an app on the platform. This is actually one of the most important things about Steem.

Everyone talks about the scaling issue with blockchains, but they all focus on transactions per second, which is the wrong thing to focus on. The real scaling issue is that for every "smart contract" chain I'm aware of (Ethereum, Tron, EOS, etc) it's getting prohibitively expensive to run a node, so everyone relies on a small set of centralized services to do it, which defeats the whole purpose of a decentralized blockchain.

The crazy thing is that it's already prohibitively expensive and blockchains are hardly used! There is literally no way any of those chains could handle any serious amount of usage. The entire model just flat out doesn't work.

The only way I can see all of this working is for each dapp to effectively be it's own chain, or sidechain, or whatever you want to call it, on top of a main chain. Steem works really well as that main chain, and it's very easy and cost effective for every app to run their own nodes.