Indeed. As far as I can tell they are like what used to be Service Packs? E.g.: I didn't install the so-called Creators Update so I'm not in the latest Windows

Indeed. As far as I can tell they are like what used to be Service Packs? E.g.: I didn't install the so-called Creators Update so I'm not in the latest Windows 10 version. I'm no Windows sysadmin though so I'm not really sure.