[michaelt]

Snap retains multiple versions of each package, following a setting called "refresh.retain" which defaults to 3.

Install Blender? That's 3x 323MB. Chromium? 3x 158MB Firefox? 3x 242MB

And don't think you're going to get away with just 3 copies of a snap like 'core' or 'gnome' - you're getting three copies of core18 and three copies of core20 and three copies of core22 and three copies of gnome-3-28-1804 and three copies of gnome-3-38-2004 and three copies of gnome-42-2204. At 497MB each.

You might think you could avoid that by reducing the setting to 1, but you're not thinking like the creators of snap - they've decided the minimum value of refresh.retain is 2.