Crazy talk. Pokemon, Animal Crossing, Smash, Dragon Quest, multiplayer Mario and Monster Hunter are coming for this platform. This is only the beginning.
Sure, but by that time the Switch has had quite some time to breathe already, meaning supply will have caught up to demand before the holiday of next year, and therefore we aren't getting craziness like this where people are lining up for a number of Switches that is a 12th of the number of people lining up.
Also, Monster Hunter XX really isn't that big of a deal, especially compared to Splatoon 2. It's preorders seem to be around 25k only from anecdotal evidence, even if it is probably a bit higher due to the bundles for it. It's not going to be worse than it is right now imo.
They absolutely won't be able to fulfill demand, but demand will gradually fall as they continue to meet bits of it over the next couple of weeks: Splatoon 2 demand is highest right now, it won't be higher in later weeks. As such, I think this week is where the lines will be longest compared to supply.Unless they're able to satisfy total demand (they won't) for Splatoon on the 21st, these lines won't stop. The continued demand for Splatoon, Zelda, Mario Kart, Arms, etc are only going to compound supply issues when these other titles come out.
As for this being the zenith? Nah. Animal Crossing, Pokémon, Mario Maker are likely coming within the next 18-24 months.
As I mention above, once those other big hitters land, supply will very likely be much better than it is now, and as such we won't see a craze like we are seeing right now imo.