[remon]

I suppose there is some value to this as a thought experiment but pretty much every tier in that architecture has breaking flaws. The most relevant being that anything that has an audience of 1 million users cannot run on an architecture that has single points of failure.

[chucksmart]

TLDR;'thought experiment', feh, if this was actual tested result would be much more interesting.

[_almosnow]

But if the author didn't "thought experiment" about that, how else would he bait you into clicking...

[aantix]

Physically the hardware can't handle it or are you just advocating that it shouldn't?

[remon]

Hardware fails. This architecture has single points of failures which means if one of those instances fails the entire system goes down. This is generally not acceptable for environments with 1 million active users (which implies high business value)