>I am sure this question has been asked a million times. And yet I am asking it again. I see everywhere online stored procedures named with prefix sp (e.g. sp_custom_account). Is there a technical or a logical reason for that? Since stored procedures are in SQL DB Programmability -> Stored Procedures, why need to tag them as SP still?

I agree... let's organize a convention and name them. You pick a country and a hotel, I'll bring the booze.