Are you one of those people who settles for mediocrity and don't demand better from companies. Why settle for 2-4 GB RAM when you can have more? I have noticed RAM management issues since IOS 11, and it had stayed that way since IOS 12, and it got worse recently, so this has clearly been an issue of needing more RAM if it had been prevalent for 2 years. Apple can optimise their OS all they want, but more RAM is needed, especially when they are introducing more cameras that are calibrated to match each other and more features like deep fusion. It's common sense that the OS gets heavier. I have the 6GM RAM ipad pro model, and it kept more apps open on IOS 13.2, so 6GB RAM should be the sweet spot, not 4GB. Enjoy your MacOS then, and stop telling us that we don't need more RAM. You don't make any sense at all.