Apple

Tbf this goes for most updates to IOS (and most other operating systems) that are feature updates. Thats why they dont encourage you to move onto the next version until the first security updates come out. I believe when IOS and IpadOS 17 came out I had to go out of my way to select an option that allows you to update to 17.0. The only operating system where this wont be true will be some Linux distros like Debian where its thoroughly tested before any features are added, this means you only get one update every few years though.