This is a completely undiscoverable feature. It isn’t mentioned anywhere I saw and isn’t part of the normal config screen. I’m happy it’s there, but now I’m curious what else I was missing...
accurate and performant rendering (we use reacts), external display support (mirror and standalone shell), KeyCast (display pressed keys, useful for screencasts and live streaming), bundled beautiful fonts (Pragmata, Iosevka, Fira Code), full width row of additional keys on software kb (cmd is there too for cmd-c/v/w/t etc), smooth scrolling (in tmux/vim/emacs too), trackpad support (within tmux panels/vim/emacs too), links detection in selection, selection manipulation via kb (vim, emacs and arrows mode), accessibility (voice over), dictation input and IME support, port forwarding and proxy command support, images view and persistent mosh connections (you can reboot device and get connection back)
I have a copy of both Blink and Prompt. Normally I use Blink more, but this keep alive is a really handy feature.