the most conservative analysis concluded that a blocksize of 4MB would be just fine and have no negative effect on decentralization.
I don't think everyone agrees with that, and I'm not sure if you are even referring to a peer reviewed paper, nonetheless that there would be no negative effect on decentralization was not the claim made in the quote:
Quote from: Alex.BTC on Today at 02:38:37 AM
Bitcoin is already standing on its own, any more increase of its transaction per second will bring Bitcoin towards critical mass, they simply cannot afford to let that happen.