I noticed that I haven’t been getting “alerts” from my blog when people comment on it. So, I emailed Microsoft about the situation and they replied:
This issue has been identified by the product team as high-priority and we want to assure you that we are working seriously to have this feature back as soon as possible.
Huh. Very unfortunate. So, if you subscribed to alerts and havent’ been getting them, this is why. Check you later.