Chrissy LeMaire wants to deprecate sp_help_revlogin:
Now you’ve migrated the logins with their passwords, SIDs, and a few default properties. But you don’t have the logins’ server roles, server permission sets, database roles or database permission sets. So now you gotta find and use someone’s modified version of sp_help_revlogin, but you’re still left with manually executing the procedure against your source and destination servers.
Oh, and don’t forget different versions of SQL Server use different hashing algorithms, so you’ll need to use one of the many different versions of sp_help_revlogin if you have a mixed environment.
Let’s hope you only have one or two SQL Servers to migrate and not hundreds.
Chrissy has a couple of great Powershell cmdlets to help get rid of this procedure, as well as a nice explanation of each and Youtube videos should you be so inclined. Definitely check it out, as well as her dbatools Powershell suite.