It seems odd that so much is required for basic access. Shouldn't there be some kind of mode that makes a marked up document out of everything and takes basic input?
Basic CSS layout features are missing from IE. If you want have a toolbar with some icons in it, you either have to do some hacky things with negative margins to prevent double margins on the edges or you can set "gap: 10px" on the container. Sure, the negative margins did get the job done, but at what point do you stop wasting all this time doing everything the more complex way to support a browser almost no one uses and has not been updated since 2013.
Not a counterpoint, but there is an AWS CLI repl/shell out there with suggestions, type-ahead, and etc. I don't use it but I've seen it and it's pretty flash.