I have always seen "@Bob" as an unnecessary bit of "textspeak" - and, please, let's not start scattering "hashtags" around.
It's just as easy to simply use the name, as you would in conversation:
"As Bob said.."
"Yes, Bob, I agree with you..."
Yes, it's old fashioned and "Boomer-ish" of me, but I happen to enjoy the written word, used correctly.
IanP, the man from Scotland
Julie, the Lady From Little Rock
Jay Feather 19XUD, pushing a Jeep Grand Cherokee