Here in BC, you only get retested for driving competency if you have a stroke/seizure/enter a coma.

I have personally seen doctors write multiple letters of competency for someone who couldn't pass the vision test, written signs test, briefly forgot where he was, and needed a mobility aid. We still gave him a road test,, which he failed, and got harassed by him and his doctor for months about giving him his license back.

Get your license suspended for reckless or impaired driving? As long as you have your full license (which is a 3 year process here) you just have to pay us $500-5000 + pay off your fines and you can drive again in 3-6 months, no retesting needed. Sure, if you get suspended 3+ times you have to go to AA, anger management, or a defensive driving course, but its only like 3 sessions.

Our basic competency is honestly a joke, and we basically never retest people... And honestly, as long as you aren't literally blind, we also don't permanently take away you license as long as you have money.