Keep memeing bro, the fork won't stunt decentralization as i have said before because by the time the blocks reach 20mb the storage space on the average computer will scale with it.
Cool story, why does the decision have to be made now though?
Because it'll be harder to achieve consensus later? That would simply mean the fork wasn't really needed in the first place.
If the fork is actually necessary in the future it should follow that at that point consensus will be easier to achieve?