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In vimium I use vim navigation for scrolling around, / for search, and a bunch of tab actions that aren't vim accurate but vim inspired.

In mpv I use gg/G to getting to the beginning/end of a file.

Many terminal file managers use vim binds or idioms (such as x for delete, marks, etc).

Then the question is readline. Not saying that vi or emacs deserve to win readline, but it’s up to you to describe how Helix mode would differ from vi mode.

Overleaf, for example, supports most of Vim’s bindings.

Shells have Vi mode: bash, fish, zsh.

i3 window manager leans heavily on vim defaults for navigating windows.