Does every android phone get updated to the new version?

Does every Android phone get updated to the latest version of Android, ex Lollipop, now Oreo. And if so how does one go about doing it? I update my phone, I have a Samsung Galaxy J1 for now. Also If I wanted to update to the next Galaxy phone, which would be the best one. I only use apps on my phone for travel Waze, Gasbuddy and a few other things. Thanks for the help.

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