++ the operating system is built in order to last many years ++ you can have problems with the battery, the hardware & on the software side with the outdated browser or losing access to the store or installed apps not working ++ Microsoft has spent on some strong gaming companies or GITHUB or NUANCE (or would have spent on simple apps, e.g. Tik Tok or Pinterest) more than for Windows Mobile ++ there have been plenty of resources, but no vision from the decision makers ++ it's a multi-platform & cross-platform mobile world & in such a world there has been room for a Microsoft Mobile arm based on ARM (even with a Goodbye, Windows phone users should have had access to ARM based apps & an up-to-date Microsoft browser as was the case with Windows 7, 8, 8.1). With more than 1 billion PC users & with a 5-year business plan Microsoft can have tens of millions of Windows phone users (they expressed interest for Tik Tok, Pinterest or discord exactly for that reason, i.e. to have a user community).