>We can get far without worrying about the last 5-10%. The solutions for the last 5-10% could be fossil fuels in the short-term, long-duration storage as it matures, or easily storeable e-biofuels.

I think a lot of people truly dont get this.

Those days when the wind isnt blowing, the sun isnt shining and the batteries and pumped storage are depleted can be easily handled with, e.g. power2gas.

It's pretty expensive (per kwh almost as much as nuclear power) but with enough spare solar and wind capacity and a carbon tax on natural gas it becomes a no brainer to swap natural gas for that.

Nonetheless this wont stop people saying "but what about that last 5-10%?" as if it's a gotcha for a 100% green grid. It isnt. It never was.