I prefer the Firefox PDF viewer personally, and now that it can do all this I uninstalled the default Ubuntu PDF reader recently. It made me think and I uninstalled the image viewer app too. For both I'd rather use Firefox.
I agree with your comment generally, but note that Dell's $699 competitor they announced this week has has a slightly larger screen than the Neo with similar resolution and brightness but better color coverage.
Contrary anecdote: I've installed and used Linux, mainly Ubuntu desktop (GNOME) on a dozen or so computers in the last ten years, including several older MacBooks, a Surface Go for my son and an HP I special ordered without Windows. I come from a Mac background and use the terminal, but I've never need to do so to get them to work. Sure I've tweaked them, but only cosmetic things like locales and default fonts. For install and use I haven't done anything special. Old MacBooks need wi-fi drivers, which usually Ubuntu will find. Besides that everything has honestly just worked for me.
If a {Dell, HP, Lenovo} firmware update fails leaving the computer bricked, can you use another {Dell, HP, Lenovo} to restore the firmware?
(Honest question: I'm a longtime Mac user, I use Macs at work and I can tell you the correct DFU port for each model. But my home computer for the last 6 years has been an HP EliteBook with Ubuntu.)