These are great if you just have a laptop. I use the Dell S2719DC and I love being able to just get everything by plugging in one cable. However, I switch between a laptop and desktop, so I wound up buying a separate USB switch for peripherals, and it gets kinda confusing:
KB/mouse -> switch -> desktop/monitor
Monitor <-> laptop (usb-c)
Desktop -> monitor (HDMI)
The downsides are that it only supports 45W charging, and you can't really use dual monitors.
Ideally I could use a KVM so everything is switched in one device. But USB switching is cheap and reliable (my switch cost $25 and has been rock solid), whereas the cheapest KVM I could find to do this cost $150, doesn't support 144hz, is stuck on hdmi 2.0, etc.
I switched to a 32:9 ultra wide instead of 2 monitors and it really works nicely for having multiple computers. Like you, I also use the monitor itself to switch inputs. I use software (barrier) instead of a KVM though.
Depending on my needs I can run one of my computers using the full width, or run 2 at half width each.
KB/mouse -> switch -> desktop/monitor
Monitor <-> laptop (usb-c)
Desktop -> monitor (HDMI)
The downsides are that it only supports 45W charging, and you can't really use dual monitors.
Ideally I could use a KVM so everything is switched in one device. But USB switching is cheap and reliable (my switch cost $25 and has been rock solid), whereas the cheapest KVM I could find to do this cost $150, doesn't support 144hz, is stuck on hdmi 2.0, etc.