It's nice but a low bar. Steam pioneered crappy Chrome-based desktop apps before Electron existed, which is also why it's so hard to run Steam in Wine. It has a longer startup and shutdown process (they even call it that) than my entire OS.
Epic, EA, etc then made their own similar launchers. Of course all of them also want to launch when Windows boots, update constantly, and not close when you press close.
I’m pretty sure the early steam client was based on Trident before chromium no?
Edit: actually it seems to have been Trident, then WebKit, then Chromium Embedded