Artistic Corner Options
I had to make a customized corner style for a project that needed to match its existing vintage look and realized how limited the options were. I had to paste the shape into indesign and even then I still needed to modify them after I converted it back to Ai in order to match the desired look.
I know with nowadays minimalism we rarely make complicated borders and corners anymore but I still don't get it why we have millions of fancy brushes for stroke but non for corner....
I hope there'll be an update with better options for this since it wouldn't be time efficient working around this the way I did
Egor Chistyakov commented
Use pattern brushes. You can define corners there.