TL;DR
They want to push even more other desktop environments and distros to use XApps, because a lot of gnome’s ex-gtk3 apps now are half-broken and looks alien inside Mint and other distros like Xubuntu.
If an application doesn’t support Cinnamon we can’t ship with it in our Cinnamon edition. The same goes for MATE and Xfce.
[…]
We could do like Ubuntu 24.04. They provide a finished product with a high level of integration. The way they do that is by modifying libAdwaita to support their theme: Yaru. We could do the same with Mint-Y. It would make all GNOME applications look nice in Linux Mint, but we’d have to remove theme selection, since it would only work with Mint-Y. In the long term it wouldn’t solve the main issue either: These applications are designed for a desktop which is more and more different to ours by the day. It’s not just a question of themes or look. Today these apps are losing menubars, themes, tomorrow they might come with no minimize button or anything GNOME doesn’t use.
TL;DR They want to push even more other desktop environments and distros to use XApps, because a lot of gnome’s ex-gtk3 apps now are half-broken and looks alien inside Mint and other distros like Xubuntu.