I have a 48" 4k non-curved monitor, running stock KDE with the launcher in the corner and UI scale set to 100%. Not only is the experience just fine, I simply cannot see having the launcher in the middle being useful. It would lead to a beak in left-right organizational thinking for where window and pinned tasks live as my active applications change and I have to hunt for their new screen position. Alt-tab breaks down after a certain number of windows, as does the exploding "overview". Having a consistent order and positioning for multitasking is both faster and less cognitive load.