"Obviously, player counts for MSFS 2024 are well over 200,000, which gives us an idea of how popular Microsoft's new simulator is."
SteamDB shows an all-time peak of 24k players since launch. No clue how many players from the PC Microsoft Store, but I guarantee it's much less than Steam. Which leaves us with XBox and GamePass users.
In the June 2024 MSFS Dev Q&A, Jorg Neumann indicated that PC vs XBox users vary, but hovers around 60/40 split, sometimes even 50/50 (
https://fselite.net/content/microso...-qa-msfs2024-info-su16-new-aircraft-and-more/).
So, let's take that 24k from Steam, double it for Xbox, and double it for GamePass and Windows Store just to cover all sides. That's roughly 72,000 concurrent users, which I think is a very high estimate.
Even if 200,000 simulated users were used to test the servers, there is usually a little overhead available, or perhaps it'd just be a delayed login instead of a complete failure of the system. I call BS on the excuse of servers being overloaded. I think something happened along the pipeline they didn't test for, or broke. I think the world would have been just fine if they did a staggered release based on platform. Or did one more public beta a week before launch.