To be honest I haven't owned a dGPU in almost 20 years, but I've been lead to understand that most users with them use them all the time and ignore their iGPU, unless they're laptop users, in which case they might have to use Nvidia's proprietary drivers from what I understand; the installation of which is something Mint makes straight forward for novices, or so I've been lead to understand. Maybe I'm wrong about some of that.
I definitely agree that KDE vs Cinnamon probably doesn't matter. But I'm afraid I don't think particularly highly of any KDE-first distro; it's great from, for example, OpenSUSE, but that's not a distro I'd recommend to new users for other reasons.
The problem I've got with Ubuntu is they keep doing weird shit like submitting desktop searches to Amazon or putting ads in the motd. They're an erratic organization and I think it's a mistake to send new users in their direction. Mint may not be perfect, but I think it's broadly inoffensive and mild, a good distro to leave a good first impression on a new user fumbling through the process themself.
Imo Ubuntu deserved to lose its users when they switched to Unity, not because Unity sucks (it does) but because it's unacceptable for a newbie-focused OS to rug-pull its entire GUI like that for any reason. But it's still #1, so realistically the leader is going be either Ubuntu or something corp-supported like SteamOS.
I don't think this is a problem at all. I tend to install Debian from the command line (Arch-style), but from what I remember GNOME is the default DE. DEs are largely a matter of opinion, but I find GNOME to be more polished overall. I do use a few extensions however to recreate a desktop-centric UX (Dock, boot to desktop and a few other tweaks).
Debian is a soft no, because despite being an excellent distro, it defaults to GNOME or the user has to deliberately choose something else, which is a problem for giving distro recommendations to noobs because whe you start tacking on stuff like "and make sure you enable the..." their eyes start to glaze over and you risk them thinking the whole affair sounds more complicated than it really is.
I mean I really do love Debian, if not OpenSUSE I would be using Debian now, but it's not a great distro to suggest for absolute novices.
I definitely agree that KDE vs Cinnamon probably doesn't matter. But I'm afraid I don't think particularly highly of any KDE-first distro; it's great from, for example, OpenSUSE, but that's not a distro I'd recommend to new users for other reasons.
The problem I've got with Ubuntu is they keep doing weird shit like submitting desktop searches to Amazon or putting ads in the motd. They're an erratic organization and I think it's a mistake to send new users in their direction. Mint may not be perfect, but I think it's broadly inoffensive and mild, a good distro to leave a good first impression on a new user fumbling through the process themself.