My ISP upgraded my fiber connection. On the + side it's supposed to be 10Gbit/s (which I cannot really test, I only have a single machine capable of more than 1GBit/s).
The new router is dumb, doesn't support IPv6 and the DHCP implementation is crap (cannot override default DNS servers)
For the IPv6 issue, I recently set up a tunnel using Route64, and it’s working very nicely. Hopefully I got the fire-walling rules right and did not expose my entire network to the internet.