ripgrep does everything you say about ag, and has much less buggy support for gitignore. It is also quite a bit faster for bigger workloads. For smaller work loads you might not notice a difference. However, ripgrep is good enough to even replace uses of grep where ag might otherwise behave sub-optimally.

Specifically, with this release, ag no longer has any major features that ripgrep doesn't have. Additionally, ripgrep gives you almost every flag found in GNU grep, and then some.

I think some of this is addressed in the README. :)