Interesting, I guess it is just an editing preference. Multiple cursors i associate with mouse use (I know it isn't the same but I bet most people use the mouse with them). I consider touching the mouse dangerous for myself and for productivity.

> Tree View

This i fully understand (and exisits in emacs) but I think not necessary either for my workflow. A treeview does already exist in a format called folders and files ;) I prefer to know the structure of the directories I'm working in and rarely require a reference to them visually

> Split window with synchronized views when showing the same file

I do too and this is a very basic emacs feature

> Regex

Emacs has a massive number of regex and non regex search options. Though usually i simply use Ctrl-Z; grep; fg, which is less efficient but fits my mental model better.

But ctrl-h a <regex> has ~ 34 commands on my machine. Including things like dired-do-isearch-regexp

> Multicursors at each line for a selection

No idea what this means sadly!

> Auto-update of views when file underneath changes (editor should ask what to do in case of edits)

I doubt any editor handles this stuff as well as emacs and is invoked in my environments daily.

Apart from multicursor stuff (that i do not see the point of for my workflow) everything you mention is a very very old basic emacs feature.