VIdéotron is also doing the hybrid 3.0/3.1 setup. I have 400/50 here (through a TPIA), Can`t recall how my channels are split, because they decided a few years ago to remotely disable the modem`s web UI, even tho I own the damn modem. So, I can`t check how they are allocated.There is only 1 Cable provider that I know in canada that has gone mid split and that is shaw. You can get 100 Mbps uploads with them modems would be docsis 3.1 on the download side and 3.0 on the upload.
They are still trying to free up enough frequencies to be able to go full 3.1, and bump the upstream speeds. That has been in the plans for years now. They are moving like snails... Part of the problem is their old Illico platform, and people refusing to upgrade to something that isn`t 15 years old.