So I have a TI-84 Plus Silver edition that I've had for 10 years. It's kind of beat up but it works perfectly fine. I know the model has been discontinued in favor of a newer one, and I've already encountered a feature it lacks due to its age (it was something in an introductory stats course, I don't remember anything else). Is it worth getting a new calculator that's more up to date? I'm in Calculus 1 right now and I plan to take pretty much all of the computational math classes and some of the upper division classes as well. Is there a specific type that's good for high level math?