Any outlet within six feet of a sink, and every outlet in a garage, bathroom, crawlspace or outdoors, needs ground fault protection. Plenty of homes in Cripple Creek, CO still have none. AAA Electric installs GFCI receptacles and GFCI breakers and wires them so one device protects the whole downstream run.
We also replace GFCIs that trip constantly or no longer reset, which usually means the device has reached the end of its life or there is moisture in an outdoor box. Every install gets tested with a plug in tester before we leave.