Sad to see this go. On a more positive note, I'm really impressed with this shut down notice.

It gives a brief explanation of the situation, clear indication of what might happen next and alternatives that people might consider.

I've had to draft one of these before so I know it's difficult. Especially the part where you mention alternatives because there's no going back after that. The only thing I'd have done in addition is to email the same message to all users (but that might already be in progress - Edit: It is).

Kudos and thanks for the service so far.