

Libre Office is maintained by The Document Foundation which is based in Germany. So from a governance point of view it’s already a European hosted open source project.
Also for online collaboration platforms, Libre Office isn’t really a good option. It is an old, sprawling codebase which doesn’t lend itself to being ported to being a server based collaborative platform. It has actually been done but hasn’t flourished, hence alternatives like OnlyOffice.
Also this is more about OnlyOffice’s issues - the lack of transparancy and true collaboration with contributors, the proprietary code used for mobile apps, and it being based in Russia which is geopolitically problematic especially if part of the idea is “Euro sovereignty”

This laptop is more than capable of running SNES emulation; its 1GHz quadcore, and 4gb ram.
SNES is an old system which had 3.58Mhz CPU and 128kb ram; you’ll be able to emulate it without much issue on that laptop. BSNES has low requirements (like an Athlon or Pentium 4, and 512mb ram, and Open GL2), although if you have problems then Snes9x and ZSnes are less accurate but lighter weight. RetroArch is pretty convenient way to deploy emulators and has BSNES, Snes9x and Snex9x_Next cores to use.
A lightweight Desktop Environement may help make the laptop feel snappier; Xfce or Lxqt. If it feels slow then you want a minimal desktop which doesn’t have overhead like compositing. Also don’t use flatpaks especially if you multitask; use native apps as flatpaks have some overhead.
Mint as a distro is fine for installing lightweight desktop environments, and if you wanted you could install Linux Mint Xfce edition from scratch.