Some dell monitors also allow switching video input via keyboard + mouse using the Dell Display Manager utility. You can set custom hotkeys for each input. I have a dell monitor as my daily driver and its my central monitor in a multi display setup simply because of the display input switching capability. Beats having to buy a expensive DisplayPort KVM.
Its about 2 seconds. Although, there is slightly longer delay when switching from a dell laptop connected to the monitor's HDMI input than the PC connected to the displayport input. I suspect it has something to do with the dell laptop going through a thunderbolt4 dock and outputting via HDMI.
