Motivation on my holodeck project has been wearing thin, so I took a detour to experiment with pinball physics. The bumpers and slingshots use only physical motion to propel the ball away - no magical impulses applied via script!
Unfortunately, I found Godot's built-in physics to not be suitable right now, even with continuous detection. A launched ball would immediately get stuck partially inside the playfield boundary collider!
Fortunately, swapping out to use the Jolt physics engine was painless thanks to godot-jolt (available in the Asset Library), and the integration with Godot has been absolutely seamless so far.