Motorola just released their list of phones with a planned update for Android 9.0 Pie. However, the Moto G5 and Moto E4 lines, both of which were incredibly popular last year, are conspicuously absent. On top of that, there is no set date for the update. Rather, it will be pushed "starting this fall."
https://www.notebookcheck.net/Motorola-releases-list-of-phones-getting-updated-to-Android-9-0-Pie.323308.0.html
My Moto G5 Plus is still on Android 7.0. I'll be happy to at least receive 8 or 8.1.