I recently had FTTP installed (UK - YouFibre) which came with its own router connected to the newly installed ONT.

Previously I was on Virgin Media, using their router on modem-only mode and connected to my Google Nest Wifi.

Despite the engineer telling me I had to go through the supplied YouFibre router first, on a whim I switched the Google wifi from the Virgin router directly into the Ethernet port on the ONT. I was pleasantly surprised to find it worked immediately without any additional configuration.

This is great - one less device plugged in etc. but I wonder if there is anything I should be aware of in doing this?

Am I just being paranoid?