Linux updates: here's the whole new desktop, GUI, appstore, start menu analog, and you can now summon a demon to do your bidding (no gui yet, you have to use the terminal until next update)
Windows: Runs update 20+ minutes on shutdown and 20+ minutes on next startup, requiring multiple reboots: nothing has changed.
Linux: Runs update for 5-10 minutes when you want it to update, changes basically the whole OS and adds a metric shit-ton of features and doesn't even care if you reboot or not.
Right click the update icon, select whatever option takesyou to the settings screen, on the right-hand side you'll find a link for changes in each update. It's not transparent, but it is available.
The only thing that I can tell happens every update is that I have to tell my start bar, yet again, to show all program icons instead of hiding them. Individually. Oh, and Skype occasionally decides it's important at startup again.
Almost forgot! My computer also randomly forgets how to sleep until updated.
It just reinstalled Edge, put a shortcut for it on your desktop and start menu, made it your default browser and migrated all your cookies and login info to Edge (for ad and tracking purposes) before uninstalling said browsers.
The only reason I click on "what's new" is to get rid of the notification. There are exactly two programs where I care and I appreciate all the other programs shutting up.