Wait until he finds out about the extreme bloat that is Ubuntu Desktop, with Snap and Flatpak to name just a few
I've been using a Linux desktop since 1998 and while other distros have their benefits, I choose to use Ubuntu Desktop for a whole host of reasons. This bloat is a non-issue (granted, I'm not running on a netbook). If I were to help someone switch to Linux, it'd definitely be either on Ubuntu Desktop or Linux Mint.