[myrmidon]

> Renewables have currently offset less than half of year 2000 nuclear generation

This is simply incorrect. You cite the iea as source, which is of course incentivized to creatively present the facts. In this case, by counting created heat (instead of electricity generation) for nuclear plants, and comparing this with purely electrical output power of PV/wind energy.

Actual power from nuclear plants in Germany, year 2000: ~180TWh, Solar + Wind now: >190TWh. Note that total electricity demand has decreased. Electricity from biomass has also grown significantly (also renewable).