I love Shortcat's approach in general, indexing the UI. However, the reliance on the Accessibility API is actually a significant downside in the real world in my experience since so many apps don't properly implement it. I feel like Warpd is a good complement to this, you could use Hint or Grid mode as a fallback when the indexing approach fails.
I wish I could use shortcat or Warpd, but unfortunately I'm on windows. Curious if anyone has any good tool recommendations for windows? Currently, I'm using:
1. Vimium for Chrome (so good, wish I could just use it across the OS).
2. Hunt and Peck: https://github.com/zsims/hunt-and-peck has been my favorite for OS-level use, a simple version of shortcat for windows. But, it's not maintained and not as slick as some of these newer tools.