> The reliance on a three button mouse, which makes it impossible to use Plan 9 on a modern laptop without finagling with modifier keys Some modern laptops whi

> The reliance on a three button mouse, which makes it impossible to use Plan 9 on a modern laptop without finagling with modifier keys Some modern laptops which have both a touchpad and a trackpoint or similar have two sets of mouse buttons, with the top one (for the trackpoint) having three buttons. The Wikipedia article (https://en.wikipedia.org/wiki/Trackpoint https://en.wikipedia.org/wiki/Trackpoint) has a list of models (note however that, for some models, it's optional so you can have it either with or without the trackpoint) and a couple of pictures of these laptops with two sets of mouse buttons.