FWIW, TL4 also have the ability to edit all posts as well. 
It’s currently tied into the trusted users can edit others admin setting, which also controls the TL3 ability to edit topic titles, tags, and categories, but there is a PR in the works to separate those out into two distinct settings Separate 'trusted users can edit others' setting for trust levels 3 & 4 - #12 by GH_Nam