Not exactly a question, unless I included "Do you already know this?"
So I found an old post by Sam Cheung and wanted to give him an @mention. To find him as I type out individual letters (ignore my own use of blanks):
@ S a m _ Ch e u n g
And it does find his name somewhere around the Che. The problem is that "Sam Cheung" is his displayed name but his actual id is scheung. So each time I entered @Sam_Cheung it would locate him quite nicely but subsequently fail to convert to a proper @mention link. Instead I had to enter:
@ S _ C h e u n g
So that it would properly mention Sam Cheung.
What would help with this is when the typist is offered a pick list to be able to select a person in the list. But if I click on a person in the list, it jumps me to his/her profile.