Nah, nothing special other than what's listed in my signature.
Small update on my input lag situation, with which I've had a renewed vigor towards solving in recent months. I notice that the input lag goes away when I uninstall the Nvidia drivers (using DDU). As soon as I install the drivers, the input lag comes back. So it seems like the generic Microsoft display drivers have less input lag than the Nvidia ones.
Now, this in and if itself doesn't necessarily mean it's 100% one thing or the other. But it does points towards being a video output related issue, as opposed to a USB/mouse issue. As with any input lag, the root of the issue can be extremely elusive and maybe multi-factoral. Without being a software engineer, I can only guess that it's some kind of faulty integration or relationship between the monitor, Windows, the GPU, the video/HDMI output, the color format settings (RGB/YCBCR/8bpc vs 10bpc), any unnecessary display/GPU scaling... Any combination of the above. But at least I'm (probably) narrowing the issue down.
I read an interesting Reddit thread yesterday, where they found that newer versions of the Nvidia drivers had more input lag, and it was due to "support for Windows 10 April 2018 (Redstone 4)." Coincidentally, I believe that update for Windows was also when this Full-screen Optimizations "feature" was introduced; so this input lag I've been suffering with may well have something to do with that, or the faulty implementation thereof.
Reddit Thread: "PSA - All Nvidia graphics drivers after 391.35 add significant input lag in Borderless Window mode" (Search for it, as I can't post links).
CPU: Ryzen 1700
Mobo: ASRock mITX AM4 Fatal1ty AB350 (AMD USB 3 ports)
RAM: G.SKILL Ripjaws V Series 16GB DDR4 @ 2933
PSU: EVGA 550W G3
GPU: PNY GTX 770 4GB / XFX RX 570 8GB
OS: Windows 10 Pro 64-bit v1909
Display: Philips Momentum 436M6VBPAB