This is the first thing I noticed when first tested geometry nodes in 2.92 alpha. The new concept of active modifier broke extremely convinient workflow.
I think UX team should think of a solution to bring this back. It’s probably too late for 2.92, but it should be back for 2.93. It’s such a useful workflow I can imagine users to be very upset when 2.92 hit the release.
The most simple logic I see here is to trigger modifier under the cursor to become active and then apply/duplicate/delete it based on a hotkey.