I published my original reasoning a MONTH ago on the development mailing list. It's not my problem if people who are using testnet don't read the mailing list. They really should!
Discussion
I did read the post when it came out, and people keep linking it to me when I ask what is going on. It explains the problems with testnet3, it doesn’t at all address your plans to nuke it unilaterally
Hey, I follow the mailinglist but from your e-mails it wasn't obvious that you're going to attack testnet. I personally don't mind but I see how people could perceive it as a dick move for not having a clear heads up to move from testnet ASAP.
If I missed an announcement please let me know.