[mu_killnine]

As a developer for some sleepy enterprise apps, I am very impressed at how companies like Zoom, Microsoft, and such can scale to handle this increased load so gracefully. I'm guessing this is just their website and not their actual app backend, but I'd imagine they had a huge spike there, too.

[mywittyname]

Given enough money, this isn't terribly difficult to accomplish with most cloud service providers. All of the major players offer automatic scaling based on load and multiple region support. There are still some gotchas at scale, but it is much easier to build out scalable infrastructure these days.