OnePlus certainly aren't having a "downfall" in my opinion. The latest OnePlus 15, although it has worse cameras, has a way bigger battery and still has the latest Snapdragon chip. The "Sandstone" finish also seems pretty cool, it's nice that they're experimenting with materials like that. The price hikes are not very nice though, but that's not really a specific issue of OnePlus, just general corporate greed from all smartphone manufacturers. OnePlus is certainly changing their target demographic away from camera-centric people like Marques, but that's hardly a "downfall". They are still selling a bunch of phones in many markets.