With the latest DLSS 3.8.2 + reshade sharpening (you need sharpening regardless of DLSS scaling factor if you want to get sharp image, because even DLAA blurs image) I get equally sharp image in both DLSS Q and P. There's only subtle noise difference around hair and grass, but that's small difference to me, so I'm already very happy even with DLSS Performance (even DLSSP offers far better image quality compared to consoles).
DLSS Quality
DLSS Performance
I also see no problems running 1440p with black borders on a 4K display. Hell, I can even run 720p + CRT mask on a 4K screen and still be happy with the image quality (I'm playing 480p / 480i games on PS2 / xbox / gamecube), becasue phosphor mask tricks my eyes and mind into believing the image is far more detailed than in reality.
People who are not willing to compromise might be tempted to upgrade their PCs more frequently, but for me it will be years before I want to upgrade. I used my old (2016) GTX1080 until recently (I also had a 1080ti for three years, but I sold it during the mining craze for a very good price). TLOU remake was the first game that I couldnt run with at least console like settings at 1440p 60fps. Becasue nvidia hit the wall with node shrinks current high end GPUs might last even longer.