Should they buy their son the new iPhone?

Should they buy their son the new iPhone?

“Our 16 year old son has my old iPhone 8 and it does everything he needs it to. He wants one of the new iPhone 13’s and he says his friends make fun of the phone he has now. My husband thinks it would be a good Christmas present, but I think that he should learn to appreciate what he already has. Am I being a Grinch?”