I want to switch from an 11” ipad pro to a 12.9”. Is it worth getting a A12Z iPad Pro, or I should only consider an M1 model? My plan is to buy from Apple refurbished. I can sell my old ipad for £275 and A12Z model is £579. It looks like the M1 model is about to appear on Apple refurbished store at £849 so my cost to upgrade will be nearly double. For browsing, streaming and Facetime is it worth the extra cost?