Regarding link saturation - have you tried tc/wondershaper? https://unix.stackexchange.com/questions/28198/how-to-limit-network-bandwidth#28203

Iptables commands - that was needed at the very launch of wg, I’ve not had to deal with it for some time now.

Personal/commercial use - I’m on a completely opposite side. It’s perfect for personal use, but its lack of dhcp support makes me question its capability in a commercial setting. Many providers offer it, so clearly that’s not an insurmountable task, but I’m still curious how they sort out their backend.

Been running my mail server on arch for six years and counting. Best decision given the circumstances!

Tiling WMs are just faster. So much faster. They remove so much annoyance it’s really hard to put it to words. Binding programs to workspaces is what finally sealed the deal for me.