I'm not overly sad to see Mike go. He seems to be a seriously competent developer, but on the political and economical dimensions, his absence is a net benefit in my opinion - don't we all fondly remember his 'redlisting' suggestion when he was chair of the Law & Policy committee?
It's easy as shit to dispute his arguments. He's basically claiming that if the blocks ever fill up, then Bitcoin has failed. Since Bitcoin can't scale to world reserve currency without really fucking big blocks (133MB with lightning network and way higher without it), it's pretty much guaranteed to have full blocks and a fee market no matter what you do. While I do think Bitcoin needs at least 8MB blocks to remove most of the glass ceiling on price, his logic is not sound at all about it succeeding or failing based on blocks being full or not.
That post might impress Bitcoin noobs into thinking there's some type of crisis, but blocks becoming full was always destined to happen from day 1. The real issue is that Lightning Network does not exist TODAY, and so blocks should be raised so that Bitcoin has more room to grow until that happens, assuming Lightning Network is even the solution to all our problems in the first place. The way I see it, a collateral bid, deterministic block production system with something like 1001 fixed block producers is the only low hanging fruit I see to solve decentralization and on-chain scaling at the moment:
https://bitcointalk.org/index.php?topic=1317450.0Huh. A r0ach post I entirely agree with. Either I'm getting soft, or you are.
(Also, add to the list of this article's bullshit arguments: "Chinese miners are the reason we don't have bigger blocks". You can blame China's influence (by mining, exchanges, investing) for many things, but causing the blocksize deadlock is not one of them. The big pools have been on record for a long time that they're in favor of raising the limit in principle.)
(EDIT) Agreeing with everything, except maybe for your PoS pet project. But that's a decision to be revisited long into the future, so it doesn't bother me to think about it.