I think it's pretty common to have time-of-use pricing (that's what my provider calls it, and I am on the plan), but it's relatively fixed. Ours switches schedule twice a year. So you can get used to it, I only charge our EVs after 10pm for example. But if it changed dynamically, I'd need to have a lot of automation in place to react, because it would get tiring to personally pay attention to price all the time.