After posting my # 1800 (well, that's where the counter has landed for me after the update), i saw the text balloon, including the green thingy telling me that i'm online and able to receive PM's.
So i decided to click on it, and surely enough i was able to compose, send and receive a PM to myself.
I do occasionally send emails to myself so i can receive and open them on different devices.
But being able to send PMs to myself seems to be a silly feature.
I complained when my ability to report a post to a moderator was removed. The argument was "but you are a moderator!". My response was that sometimes I need to get a second opinion. That isn't exactly what you are reporting, but yes, probably someone would complain if it was removed.