Not the same thing. With session saving I don’t have configure anything.

KDE + wayland on Tumbleweed gave me this experience.

Wayland has at least one deal breaker for me. It doesn’t remember where my windows were at logout when saving the session. I have six virtual desktops and have specific windows in certain desktops. Putting everything back where they belong after each login, no thank you. Until they add that I’ll stick to X11.

If developers want to make a desktop application they should use proper cross platform desktop frameworks like QT or GTK or even JavaFX instead of a webpage disguised as an application.

Windows update, at least since the inception of the concept has never required me to go to a browser

In xp it still was an website which required IE due to activex used to do the updates.