I now see you post on this new dongle, interesting. Other than the flash, I still think there are pluses and minuses for both bridge and dongle. An ethernet connected bridge would be another interesting option, and I see some folks are working this. To the bridge connection options, based on my ownership the following info, in my LAN both wired and wireless bridges have worked fine:
Phillips Hub - ethernet connected but has wifi option that I think was never turned on (which is interesting)
Aqara Hub - wireless only
Ikea Hub - ethernet only
Samsung hub - both ethernet and wifi option (perhaps it is not fair 2 call this device a ‘hub’ but rather a host with direct connect zigbee coordnator processor)
Lutron hub - ethernet (but totally different wireless frequencies for devices)