Is that keyboard comfortable?

It may take a few days to get used to, but just start by learning the basic movement commands (char up/down, char left/right, scroll page up/down, i-search backwards/forwards) and navigation commands (find file, switch buffer, split window) down and you have a decent baseline start with, then just gradually learn more commands afterwards. It’s really not that difficult… I recommend the basic internal tutorial, just press “Control+h” and then “t”. Stop thinking and just start now!

Theres million Emacs resource and tutorials online, as well as a built in tutorial into the program it’s self. Even the reference book written by Richard Stallman himself is free to download on the FSF website. Maybe start with in-depth tutorial websites, like Xah Lee’s website. His tutorials are straight to the point and easy to understand. And expect to take months to learn this program. Emacs is just not something you can easily breeze through.

Is this only in Emacs 29 or have I really never known this existed for this long???

I see… Yeah well I love my handsome Bison thank you very much.

I mean how does it relate to Emacs?

Can someone help me understand what this is please?

People use Emacs for mail? The more you know I guess…

Version control. That is all.