The power grid wont fail, but charging those ev's will get harder before it gets better.
Right now electric utilities are having a hard time keeping up with normal demand for new transformer installations. There is a huge shortage of transformers across the industry and many attribute that shortage to the raw materials used in battery production. I deal with that fact on a daily basis. It is slightly better than in past months, but still very far behind the normal production numbers of transformers pre-ev.
So by all means, buy your ev if you want one. But I will stick with my gas guzzling fume emitting raw power fossil fueled mode of transportation for years to come.