I’ve spent over 25 years with Linux. With multiple distros and a lot of that with Gentoo and Arch. At work I specify Ubuntu or Debian, for simplicity and stability. I always used to use the minimal Ubuntu, because it was tiny with no frills. For quite a few years I managed a fleet of Gentoo systems across multiple customers - with Puppet. Those have quietly gone away. I’ve dallied with SuSE (all varieties), Mandrake, Mandriva, RedHat, Slackware, Yggdrassil and more.
Arch is surprisingly stable and being a rolling job there are no big jumps. When I replace one of our laptops, I simply clone the old one to it and crack on. I used to do the same with Gentoo - my Gentoo laptops went from an OpenRC job with dual Nokia N95 ppp connections around 2007 to through to around 2018 with systemd and decent wifi when I switched to Arch to allow the burns on my lap to heal. I still have a Gentoo VM running (amongst friends) on the esxi in my attic.
It was installed in 2006 according to some of the kernel config files. I left it for way too long and had to use git to make Portage advance forwards in time and fix around a decade of neglect. It would have been too easy to wipe and start again. It took about a fortnight to sort out. At one point I even fixed an issue following a forum post I made myself years ago.
Anyway, Arch is pretty stable.
A discarded Windows laptop is ideal for use with Linux. That’s what this Managing Director of an IT company has been doing for over a decade. My desktop PC is a customer cast off from a good five years ago. I slapped in an ageing Nvidia el cheapo card to get two monitors running. My laptop is a cast off from one of my employees - I simply opened it up and moved my M.2 card into it.
I do run ESET on my Linux gear to show solidarity and to show that Linux really is rather more resource friendly than Windows. I login to AD and I use Evolution with Kerb to access Exchange for email. I have the same “drive mappings” to the same file servers too and so on and so forth.
I used to teach word processing, spreadsheeting and databases n that for UK govt funded courses, I’ve written a Finite Capacity planner for a factory in Excel (note the lack of In-). I still find people who have no idea how decimal tab stops work or how to efficiently use styles. I can confidently inform you that Libre Office is just as good as MSO. They both have their … issues but both work pretty well.
Kids are easy. Adults are a pain! KDE has a lot of educational games ready to go out of the box.