This is too irrelevant for a full-fledged announcement, but as of yesterday afternoon, Flathub builds are caching downloads and ccache files. Based on some random GIMP updates: aarch64, no cache: 44m 56s aarch64, cached: 13m 35s x86_64, no cache: 67m 49s x86_64: cached: 16m 17s #flathub