I was thinking of asking "What Texas Instrument graphing calculator would you recommend for Calculus 1 and/or 2?"
Is this appropriate? I looked for similar a question, but couldn't find one; even a closed one.
There are currently 106 questions on the main site tagged as calculator, so some questions about calculators are on-topic.
In this particular case, however, it's a lot more borderline: There is a lot of variation between calculus courses, requirements, and whether any calculator is acceptable at all for the course. An answer to the question would really be up to university / professor policy, and could potentially be closed as opinion-based.