After having gone very far down the rabbit hole of custom keyboards and custom layouts, it's insane how slow innovation is around the "standard" keyboard. I get that backwards compatibility is of utmost importance, but surely we can do better than that.
The Office key is apparently just CTRL + SHIFT + ALT + WIN, as Office Key + W is advertised to open Word and Office Key + L is advertised to open LinkedIn, but you can perform both of those actions in plain Windows by just using CTRL + SHIFT + ALT + WIN + W and CTRL + SHIFT + ALT + WIN + L respectively.
The Office key shortcuts get bound by Explorer when it starts. If you bind the keys when Explorer does not run, you own them and can then free them after Explorer has started.