Maybe in some ways, yes. But there are distros out there that can run easily in as little as 1G RAM. And I heard people have used it with far less.
I also remember hearing Ubuntu moved to default to Wayland, if true I have to wonder if defaulting to Wayland is part of the problem because Gnome / KDE on Wayland will use far more memory than FVWM / Fluxbox on X11.
FWIW, you can do a lot just from the console without a GUI w/Linux and any BSD, in that case the RAM usage will be tiny compared to Windows and Apple.