The company revealed this information on their forum. OnePlus specified that they have been listening to user feedback and have taken this decision as a result.
However, the company also mentioned that because they are now focusing their efforts on the Android P update for the 3/3T, they are skipping the Android 8.1 update for either devices (they currently run on Android 8.0).
Further information will be revealed at a later date.
Battery, USB speed and camera performance on my OnePlus 6 is great. Still lacks the waterproofing but no problem for me personally
The problem with the OnePlus 3/3t was that it lacked many of the 4G-LTE bands, such as one of the commenters on here from Australia. The OnePlus 5/5t/6 finally fixed that shortcoming, but they still suck when it comes to waterproofing, battery size, ...
Nice, so basically they were pressured by the fans to update their 2 y.o. device? Looks like they settle after all. But why couldn't they do the same for OnePlus 2 and OnePlus X?