The graphical "gnome software" software installer was replaced in the default install by a snap-only fork named "Snap Store" with no support for Flatpak (see https://bugs.launchpad.net/snap-store/+bug/1871944). Were there some technical reasons for this move or was it a business decision to kneecap the other package format?
It's not true. GNOME Software still ships Snap plugin. It's Canonical that decided to fork gnome-software and provide it under different name without competition plugins enabled.
The graphical "gnome software" software installer was replaced in the default install by a snap-only fork named "Snap Store" with no support for Flatpak (see https://bugs.launchpad.net/snap-store/+bug/1871944). Were there some technical reasons for this move or was it a business decision to kneecap the other package format?