Due to Silverblue nature, Flatpak applications are more used than rpm layering, which brings quite a few GB on Sdk/Platform installations.
It has come to a point in my default installation that the root partition is full, and I have less than 30 applications installed. This is also due to Flatpak installing by default system wide instead of user wide. I had to start uninstalling some applications to install other applications, which is less than ideal.
I guess Silverblue should either increase the root partition size to give more room to both Sdk/Platform bits and apps or do installation of apps per user while leaving the Sdk/Platform system-wide.