I would like to mention that I don't eliminate duplicates. So my 5K reported by CbB is def filled with some thinks like multiple Izotope's (RX-7, 8. 9 and 10; all advanced. Or Ozone 7, 8, 9 and 10).
So yeah, my 5K on CbB is probably more like a true 4K (or maybe even the ~3.1K reported by Studio One).
My 32bit plugs (exactly 19 are installed ) are not counted in any DAW because I never point my DAWs to that "Program Files (x86)\vstplugins" folder. I've long since stopped bridging 32bit plugins.