Yeah while the European windows are interesting I don’t really get why having a window open 50 different ways is useful. It seems like an over-engineered solution to just cracking the window. I also can’t imagine it’s more reliable than the good ole vertical/horizontal sliding windows which are just a window in a track.
Many houses in the northeast have the old school vertical sliding windows with an extra glass pane that can be dropped in front of the screen. This creates an air insulated barrier between the internal and external glass panes and even on the 100+ year old windows I’ve seen they insulate very well.