Satoshi didn't have a 1MB limit in it. The limit was originally Hal Finney's idea.  Both Satoshi and I objected that it wouldn't scale at 1MB.  Hal was concerned about a potential DoS attack though, and after discussion, Satoshi agreed.  The 1MB limit was there by the time Bitcoin launched.  But all 3 of us agreed that 1MB had to be temporary because it would never scale."

Re: Permanently keeping the 1MB (anti-spam) restriction is a great idea ...
February 07, 2015
Cryddit / @RayDillinger

https://bitcointalk.org/index.php?topic=946236.msg10388435#msg10388435