I'm surprised I haven't seen this thread before. I'll add my similar experience. When on a 6,000 solo trip to the west coast and back last year when my 2015 R3T was new, the oil pressure went on in one of the worst possible places - in the middle of nowhere in mountains in Oregon. The light would go on for a minute or so then off for a a bit and then back on. This kept happening. There was no shoulder to pull over onto. It was too dangerous to pull over anywhere because I was in extreme twisties. There was no cell phone service. I absolutely hate even the thought of letting any engine run at all when there's a possibility of no or low oil pressure but there were no tell-tale tappet sounds or any other out-of-the-ordinary sounds from the engine and it was running fine. As much as I hated to, I had to ride on to the nearest small town about 50 miles ahead (Sweet Home, Oregon). It was a nerve-wracking 50 miles. Not taking any chances and having access to free towing, I had the bike hauled to Triumph in Beaverton - about 100 miles or so. (I''l post a strange experience I had at Triumph in Beaverton in a separate post.)
They determined that the oil pressure sending unit was bad and replaced it. The light never came on again when running for the rest of the trip but just this week on a 700 mile trip with my wife, the oil pressure light came about 50 miles from home and then went on and off again for a few miles. Again, there was no tappet noise and the engine was running fine. But this time, the light went out and never came back on for the the rest of the trip so I continued on without a problem. If it comes on anymore, I'll take it to Triumph as it's still under warranty until next spring.