Flatpak didn't always exist. If my Linux example misled you, let me rephrase: can you run modern AAA Windows games using good old Windows XP? If you can't, you

Flatpak didn't always exist. If my Linux example misled you, let me rephrase: can you run modern AAA Windows games using good old Windows XP? If you can't, you've hit exactly the problem I describe. It's a problem of software in general, and flatpak doesn't solve it. Flatpak itself may be subject to it!