You know mysterious people, must be the same wanting Windows XP in 2018.It should also be noted that not all Android users want the latest version therefore they can run older versions of the OS if they choose to with less concern that apps will suddenly become incompatible as happens if you are not running the latest release of iOS.
The iPhone/iPad user is not even given the choice to rollback to a previous release these days because when Apple release a new version of iOS they immediately stop signing the previous version. Fortunately Apple do not do the same with macOS.
In Software developement stagnation means regression.