[megous]

What's cross-platform experience for packagers/builders? Seems like you can't do cross-compilation, so expecting upstream to provide flatpaks for users is expecting upstream to manage virtual or real machines for every [desired] CPU architecture with all the annoying host distro installation/management, networking stuff, etc.?

At least with the current model, upstream developers can offload most of that to distribution packagers.

[wmf]

In reality every desired CPU architecture is x86-64.

[megous]

I have GNU/Linux desktops on armv7 and aarch64, and i686 laptop. So with this attitude, flatpak is mostly worthless to me.

[ndnxhs]

That's not reality at all. Many laptops run ARM CPUs now. Especially on Linux.