We're making sure Real-ESRGAN reaches people who cannot use CLIs (so that pretty much includes 99% of the population). Also, I have a PR in the making for their ncnn-conversion script, it ain't much but it's honestly the best I can contribute when it comes to Python and AI.

Real-ESRGAN creator also encourages others to use their tech in their projects, as mentioned in their readme.

I know we're not really enhancing Real-ESRGAN's code at the moment, but we don't want to disrespect or disregard their hardwork either.

It sure does for me. The other projects linked here are I find overwhelming, Upscayl I find approachable.

The alternative I see to Upscayl would be some online service that's similarly approachable for "I just want to upscale this right now".