I always have a case, but no screen protector, the case extrudes enough from the front to protect the screen most of the time.
I used to have a screen protector, but because it adds extra width it went outside the edge of the case and it broke. And honestly I prefer microscratches over trapped dust particles. The only reason I'd put a screen protector on my phone now would be to replenish the oleophobic coating, and I'd do it, it's just that idk which brand I could trust to actually have a good one included.