My wife is the same. She had the 6s plus until 2 years ago when I bought her the iPhone 12. Due to having problems with the battery I bought her the 14 pro max 512 yesterday. The 15 pro max doesn't have any further improvements and since she has lighting cables I bought her this. She is not on her phone all the time. She has an ancient MacBook for all her work and she is happy with it. The 6s plus stayed for many years and millions of pictures inside.
My wife is the same. She had the 6s plus until 2 years ago when I bought her the iPhone 12. Due to having problems with the battery I bought her the 14 pro max 512 yesterday. The 15 pro max doesn't have any further improvements and since she has lighting cables I bought her this. She is not on her phone all the time. She has an ancient MacBook for all her work and she is happy with it. The 6s plus stayed for many years and millions of pictures inside.