on 11-01-2023 15:32
Just in case this impacts anyone else, I recently changed from 250 to 1G and wasn't getting the speeds I expected. Faffed around with Hub4 in and out of modem, etc etc, minor boosts to 350-400, but still not good enough.
In the end it was the traffic control on my Synology RT2600ac, it needed to be updated with my new limits, and was adviced to add 10% so 2473Mbps for Down and 58Mbps for Up.
This was under Traffic Control -> Advanced -> Settings.