User blog comment:MisterWoodhouse/The first migrations to the Unified Community Platform/@comment-45057330-20210109114715/@comment-1038387-20210109183702

You can disable the toolbar in your preferences if you use the 2010 Source editor.

Comments can't be altered, but they can be disabled on wiki wide basis.

I'm sure there's some css alteration for profile pages on the Dev wiki, but this is only for personal use.