Agreed that RDP is very well designed. And we don't have an equivalent in Linux or Mac world. All competing protocols are a compromise. I am particularly impressed with good multi-monitor support in RDP. Competitions has had more than a decade to get it right. But I am unaware of any that does.

If I connect remotely from a 2 monitor setup, disconnect and re-connect from my laptop with just a single display, it all magically works. Everything readjusts automatically. I don't know of any other remote desktop protocol/tool that does this so well.