MTS Update Finished

While we are offering this option to players, we advise against taking this step, as the account ID offers another piece of unique information through which we identify you as a player, which will no longer be available.

So they think it's a good idea to have, but they removed the option.
Allow us to combine our powers in an attempt to understand this.

Really though, as I said, all the ID does is prevent your email from being put out in the world should there be another login-leak.

If your email gets brute-forced, well, you're an idiot.

If you have a proper password on the account and a decent provider, the biggest threat anyone can present is signing you up for spam lists.
The spam should only bother you if it's your primary email account and it has a pomegranatety spam filter in which case, congratulations, you still managed to be an idiot despite properly password protecting your account.

I'll stick with my ID and pretend this thread never happened.

Ditto.