It was explained on the threads that were locked, and again in more depth on a stickied thread of its own. Every poster that asked for their OP had it returned to them. Literally all people had to do was PM a moderator for the code and start a new thread - considerably less effort than people have spent in complaining about it in the first place. You're making mountains out of molehills here.
This would be true if that had been what he actually meant.
What he meant:
FSE: Look, let's cap all threads at 100 pages, because our server lags, and BCoF, NW and FSE site are all same servers.
Now, to let them know, we are going to explain all this in three easy sentences to the community by making a public announcement we will start doing this in one week.
*POsts announcement
*Some people moping and crying over nothing
*At least 75% of community going: Well, shame, but now we get to back up our threads at least
Issue resolved, carry on, plebs.
I think your policy of informing the community is a bit off.