What if you "can" technically exit, but the fee will cost you all the value of your UTXO? Essentially the same as not being able to exit

Extreme scenario #1: Centralize via small blocks (99% can't afford to transact on chain anyway...so they won't run a node)

Extreme scenario #2: Centralize via large blocks (99% can't run a node)

...or somewhere in between where we conservatively raise blocksize according to lower end capability of current tech and avoid either extreme.

Fat chance I know. An anon can dream.