> Does Pop inherit Ubuntus snapification with 20.04?
Not out of the box. You can manually install snapd and use snaps on Pop, but all of the software we ship is Apt packaged, and Flatpak/Flathub are supported out of the box. Additionally, some apt packages which install snaps in Ubuntu (like Chromium) install the apt version of the application in Pop.
> Do they release newer kernels for the LTS releases like Canonical does with Ubuntu LTS?
Yes, we track the latest Ubuntu kernel and ensure that the newest one available is installed. Our kernel is usually a bit newer than Ubuntu's (due to our focus on System76 hardware which, being new, often requires a newer kernel for all hardware features to work correctly). Obviously the newer kernels also have benefit beyond just S76 hardware, and Pop is in no way restricted from running on non-System76 machines.
> Do they pack ZFS in the kernel like Ubuntu?
Yes.