The calculators are a completely counter-productive and distracting tool for “learning” which have contributed to a watered down curriculum with more mindless button punching and less thinking than before. Anecdotally some students never recover from the mistaken idea that math class is about learning how calculators work.
There is no reason to assign problems which require a calculator in high school mathematics courses, and for anything that would benefit, there’s a huge advantage in using a computer with a full-sized keyboard and a general-purpose programming language, or even a smartphone with a web browser. Do your basic plotting at the free desmos.com, with the added bonus that sharing plots with classmates is trivial because you can generate a URL.