FWIW, the incumbent ISP in Switzerland, Swisscom, tried to roll out XGS-PON but our "Internode", Init7, fought them in court on the grounds that it was anticompetitive, since it locks every provider into a single technology. They won.

Now customers can choose. Nearly every ISP chooses the easy way and has the customer connect through Swisscom's XGS-PON but Init7 in particular has instead built out their own routers in POPs around Switzerland so that customers can have a physical fibre directly to their network. It's just plain ethernet with DHCP so you can use whatever equipment you want. It's also allowed Init7 to do something none of the other providers can do: offer 25Gbps symmetric service at no extra cost (beyond a one-off installation cost for the more expensive SFP modules).