A dead key is annoying. A half-working keyboard is more confusing. The useful question is not just which key failed, but whether the failure follows a pattern that points to software, transport, or real hardware damage.
Double typing usually is not random. It is usually a setting problem, a transport problem, or a keyboard starting to fail, and the fastest fix depends on figuring out which one you are dealing with.
Low-profile boards usually win the first impression. Standard boards tend to win only when the desk height, hand position, and typing feel are already working in their favor.
The real question is not whether a full-size keyboard feels familiar. It is whether the numpad and extra keys do enough work to justify the mouse space they cost.
A monitor with USB-C and a hub can be the cleanest one-cable setup on a desk. It can also leave you short on ports, power, or switching once the setup gets heavier.
A lot of people buy a KVM too early. Sometimes a USB switch and decent monitor inputs solve the real problem with less cost, less clutter, and less setup drama.
If your setup feels off but you do not know what deserves money first, this 5-minute test exposes the real bottleneck before you buy the wrong upgrade.