Maybe I'm in the minority, but the 19/20 Pros having curved screen is exactly the reason to go for the 18 Pro and skip all the successors until Apple vome back to flat screens.
Apple is currently testing a quad-curved display for the iPhone 19 Pro and/or iPhone 20 (2027), signaling a potential radical design shift for at least one of the 20th-anniversary iPhone models. Details indicate a transition to bezel-less OLED panels with under-display camera technology, hinting at a major hardware overhaul.