Fun tidbit, DuckDuckGo has a bang for it, I use it all the time.

!a2 <program name you want to replace>

A2 has been changing a lot over the years. I have found it’s UX to be going in the wrong direction and it feels like it’s on a path towards too much ad monetization and spoiled trust. For now it seems fine still but it does list alternatives to itself which could use some love and support along the way as A2 grows.