At the rate phones are being released, it is safe to say that companies tend to stretch themselves too thin which is when when it comes to Android updates, many companies pick and choose which devices they want to focus on, and more often than not after a couple of years, you can kiss goodbye to said updates.
This is why it doesn’t really come as a surprise to learn that OnePlus will be done with the OnePlus 3 and 3T after the Android O update. According to a post on the OnePlus forums, the company’s Head of Product Oliver Z revealed and confirmed that Android O will be the last major Android update for the OnePlus 3 and 3T.
However this doesn’t mean that OnePlus will be abandoning either handset. Both phones will still receive updates such as security patches from time to time, but don’t expect them to receive the next major Android update, which assuming Google keeps to their naming scheme should be Android P and should be released in 2018.