It always puzzled me that the one searchable thing in Alfred with really poor support is Alfred's own command history ..
I had hoped that this was on the list for Alfred 5 but it seems to be the same lame, unsearchable 20 entry history, which feels like a quick afternoon hack.
Don't get me wrong, I love Alfred. I think though that Alfred 5 ought to have:
A longer (configurable on size or retention time?), persisted history.
Searchable on entered prefix when using CTRL-UP and CTRL-DOWN
Cheers /Flemming