Linux is great for some stuff, but unless there's massive upgrades to where you can just hit "install" and something installs and works without fucking around in terminal
https://i.imgur.com/JFbxr3a.mp4
Wait what!? I just mark file as executable, run as program, and click nex then install.
Also on a more serious note, how easy is it to find apps on the software store too (yes, because most linux distros offer a software store now)
I use Gnome document viewer on Gnome and Okular when on KDE when viewing PDFs.
For editing PDFs, always was used to PDF Studio. I heard LibreOffice Draw is decent but never bothered trying it as I am happy with my current workflow... for now.
PS: PDF Studio is a one time purchase