Here in Curitiba it’s this church:
It’s constantly maintained and renovated, but the building is 287 years old, built in 1737. (For reference the city itself is 331yo.)
It’s kind of funny that people here don’t typically remember the name of that church, Igreja da Ordem (Church of the Order; the “order” in question are the Franciscans). Instead they remember the name of the square that the church faces, named after the church - o Largo da Ordem (lit. “Order Plaza”, but more like “the plaza of the church of the Order”).
Have the router ask the server if there’s an update available when turned on. If none, proceed as usual; if there is, force the update, regardless of the time of the day. Problem solved.
Of course, for that you need to acknowledge that you violated the “ask, don’t be an assumer” rule, instead of bossing customers around with “golden rules”. You won’t change their silly and pointless habits anyway.