These scientists would beg to differ:The small difference is that during the 60's the nation was greatly expanding electrical production with massive additions of firm 24/7 fossil fuel and nuclear power generation. Now we are decommissioning these firm 24/7 power generators and replacing them with intermittent power sources. NYISO knows a thing or 2 about grids is raising the alarm in NY.
https://www.empirecenter.org/publications/nyiso-new-york-electric-grid-remains-at-risk/
The reason why is no mystery – under existing state environmental policies, the state is losing reliable electricity generation resources faster than new ones are being brought on line.
Fortunately, it seems that American's at large really do not want EV's as evidenced by the poor sales of Ford, GMand European offerings. It seems people really want Teslas, not EV's broadly. So our grid will remain at marginal capacity (instead of robust capacity) for a while longer.
https://www.ucsusa.org/resources/renewable-energy-reliable
And if the New York grid is closing fossil fuel generation capacity faster than it is replacing it with renewables than that is poor planning, not an indictment against the technology.
"Looking further down the road, a groundbreaking study found that the U.S. can generate 80 percent of its electricity from renewables by 2050 using existing technologies, with as much as half coming from wind and solar, while reliably meeting electricity demand across the country every hour of every day, year-round."