That Algorand paper suggests a way of scaling consensus to large numbers of nodes, i.e. by running a consensus algorithm on a random sample of nodes. It doesn't address scalability with respect to transaction volume, which is what people usually mean in the context of the blockchain trilemma.
Thats laughable nonsense tbh. People should "mine" to compress the blockchain lol. The blockchain isnt even needed (the history). Have a look at XRPL srsly its the perfect example it has terabytes of past transactions and they are stored by some nodes but its not needed to make progress. And ofc it could be compressed but that totally destroys its purpose. If you want the transactions you want to be able to query them which you cant do efficient if its compressed.
You didn't even say permissionless in your post.
Ripple is a company you mean the XRPL.
The XRPL is permissionless in every aspect.
You can insert transaction without anyones permission.
You can run a node without anyones permission.
You can fork and create you own version without anyones permission.
You can change code and create an amendment without anyone's permission. It needs 80% favorable votes for two weeks to become active but it doesn't need anyone's permission. There is no entity that can vote against it and prevent it.