The Steam Client Beta has been updated with the following changes:
Steam Achievement SetsA new way to organize, track, and complete a game's achievements. Read more details in the announcement.
Games can now organize and group achievements for base game and DLC content
DLC achievements can be added via sets without breaking game completion
Completed achievement sets remain completed when new sets are added
Achievements and sets can be archived if they are seasonal or can no longer be...
Still just a chromium framework though, right?
Electron
technically CEF, which is mostly the same but somewhat more efficient
And running inside the same steam runtime used for games. Oh well.
Is that a problem? It’s not like the steam runtime is something extra that you need to install and set up