Of course the longer they have been brainwashed the less they have matter to think about. North Korea is an edge case now but we have plenty of countries with a forever president. Once it gets to 20 years it got so much time to shape the country to ensure further 20 years of power that's basically over. People had chances to change the president before. Some of those countries have periodic rebellions, other are silent. Even North Korea had less than 20 years of a Kim at a certain point. It was coming from a destructive war, etc, and yet...

I think that the USA have a good balance with their two 4 years presidential terms. If one of their next presidents asks to raise it to 3 terms, be prepared to get a forever president there soon and all that it means.