They like to complain about the memory usage on startup. Because it caches a lot of applications for fast loading. It will clear them when required. The more memory you have the more it will use. My laptop has 16gb it uses around 3gb on fresh boot with Fedora 39 and GNOME, I recently upgraded a 10 year old workstation to 64gb (because it was cheap) and with Fedora Silverblue 39 it uses a bit more memory on startup. Unused memory is wasted memory.
They like to complain about the memory usage on startup. Because it caches a lot of applications for fast loading. It will clear them when required. The more memory you have the more it will use. My laptop has 16gb it uses around 3gb on fresh boot with Fedora 39 and GNOME, I recently upgraded a 10 year old workstation to 64gb (because it was cheap) and with Fedora Silverblue 39 it uses a bit more memory on startup. Unused memory is wasted memory.