I have Rogers fibre to my unit which started as RFoG and was later upgraded to an actual ONT and symmetrical speeds. The only time I had an issue is during the country wide Rogers outage.
My setup is ONT to UniFi equipment, the Rogers "modem" was removed within 5 minutes of the tech leaving, that was a few years ago and it's been that way ever since.
I speedtest at or above 2.5G symmetrical at times.
I'm very happy with the service.