But if you really wanna run a webserver for the next 20 years without maintaining it, isn't HTTPS the least of your problems? What about system and software up

But if you really wanna run a webserver for the next 20 years without maintaining it, isn't HTTPS the least of your problems? What about system and software updates to fix critical vulnerabilities? Hardware failures? I feel these things would take much more maintenance time than the occasional certificate renewal.