OnePlus are fairly good at updating phones.
I still use a OnePlus 3, which I bought in July 2016 (it was released in June 2016), which cost me £309 at the time, including delivery, and came with Android 6.
This was updated to Android 7 and 8, and the last update was expected to be 8.1, but even though a beta had been around for 8.1, they skipped it and went directly to Android 9 instead. (Apparently something along the lines of, "We were doing the work for rolling out Android 9 to the 3T anyway, and there wasn't much hardware difference between the 3 and 3T, so might as well roll out for the 3 while we are at it")
Last update was in November 2019, to security patch 2019.10, still on Android 9. So basically 3 major OS updates over its life, plus security patches for about 3.5 years. Not too bad really.
Main issue now is the price, with their cheapest phone being the 7T at £470 (current discounted price), but that's also last years September release. The 8 and 8 Pro came out in April this year (cheapest of those is £599).
But, all that being said, there are rumours about a OnePlus Z phone coming out soon™, aimed at the mid range. For comparison they did a mid range 'X' model back in 2015 for $249, so they have form here.
It was apparently due for launch in April, along with the 8 and 8 Pro, but it's been delayed till later in the summer, dates and details yet to be confirmed. But might be worth keeping an eye out for.
Biting the hand that feeds IT
