Lightroom can’t handle large resolution images, even with minor levels of editing, and it is even more unusable with more complex edits applied. Lightroom became the bottleneck in my workflow, so, as much as I don’t love the UI, I’ve had to switch to Capture One Pro. If Adobe were to rebuild the software from the ground up with a stronger focus on performance, I would like to be able to return to LR. It can be done - Phase is doing it. My RAW images are big, but they aren’t so big that a program intended for professionals shouldn’t be able to handle them. What about when I jump from the D810 to the 850? Or if I start renting a 100 megapixel medium format back? Or if I digitize my medium and large format films with my DSLRs by stitching frames? Lightroom doesn’t scale well and relies too much on system hardware to make up for sloppy programming. The goal should be to use fewer system resources, to make the system work smarter not harder. Adobe has been a huge disappointment to me the past several years, and I’ve loved their kit ever since I started with them in 1997. So, Adobe, step up your game and make real stuff again. The professional world is waiting.