Reddit comment that shits on Mircea Popescrackapipescu gets the most upvotes:
https://www.reddit.com/r/Bitcoin/comments/2yjqce/gavin_andresen_optimistic_about_scaling_bitcoin/

"... cue Mircea Popescu and his Scooby Gang: "Gavincoin's gunna be worthless! Respect mah arbitrary block size limit cause: incoherent ideological economix reasonz." Current value of the limit is arbitrary, that's not even a question. There being some limit makes sense (to prevent flooding), but demanding to treat the current value as immutable is an insult to your own intelligence.

Satoshi pointed out years ago already, at some point, as the network grows, we probably want to do something like
if (blocknumber > 115000) maxblocksize = largerlimit

Makes sense, unless of course you have a very different plan for the network in mind...
The only good (EDIT) logically valid, but still pretty bad reason I can see to be categorically against adjusting max block size as the network grows (adjust the limit, not remove it entirely) is if you would like Bitcoin to turn into "semi fungible high limit poker chips for the elite" in the long run. (I like that description, took it from here.)" - Oda_Krell