I know a few people in France who actually ditched their landline contract, they had full 4G coverage but were still at 8mbps with their landline. So now they're doing tethering for the complete house instead. The only thing they can't do is gaming because the ping is atrocious.

It's also cheaper, a 4G contract with a 100GB cap is about 15€ per month, whereas my FTTH connection at 900Mbps down / 400Mbps up cost me 40€ per month.