OP is hyperbolic framing of a genuine issue. Pacific Northwest is one of the more extreme cases, due to the confluence of hydropower seasonality with renewables. In general, we will address the variability of wind and solar by building more continent-scale grids, with lots of storage, with overprovisioning of solar PV (which is now so cheap it pencils out even with occasional curtailment in many cases), with load shifting, and for a decade or two by running natural gas speakers in extremis.

Read this article and notice what a key role storage plays:

https://www.vox.com/energy-and-environment/2018/7/13/1755187...

Then recall that at least three major automobile companies are making $1B-scale investments to make solid-state batteries cheaper and higher performing than the Li-ion technology that is cost-effective at grid scale today. Articles like OP that cherry-pick atypical cases and ignore cost curves take a real issue and blow it up into a crisis, which it is not.