UPDATE:

I was able to set up my hotkeys with Autohotkey to be "Spring-loaded", as Adobe calls them.
For me, H is rectangle, J is circle, K is polygon, and L is line (across most Software that I use).
Pressing the key just sends it once. Holding it for more than 200 milliseconds keeps it waiting, and once I release it, it sends the hotkey associated with "Select Last Created Object" Script.

This way, I get the best of both worlds.

It can be done with "Extrude" too. If it's kept held, then it'll send "Delete" after the release, removing the original curves.

The possibilities are endless. It's a matter of preference at this point.

Hope this helps. Cheers.