I desperately wish Linux distros used this trick too. I am tired of waiting for updates to download and having to clean out some cache folder that apt uses to free space.
Interestingly I found myself using ultra minimal distro vm, and installing nearly nothing on them (qubes os) and just shard the apps: the startup / update of the main gui linux is trivially fast, each vm only has a little subset of apps I care about, and when I trigger a many-vm update they do it in sequence and just update their own subset, meanwhile I can fully use the other vms.
Also I tend to use stable-like distros now like debian and barely see updates coming in anymore, compared to my fedora youth when there was several updates a day, some breaking everything.
Isn't this basically the idea behind snaps? Or is that more docker-like?
On my fast home connection dnf is way faster than apt to update my laptop unless it's a really small update, then apt is faster because it refreshes the repos quicker.
I think there are alternatives to apt that can do parallel downloads and delta as well.