This is cool, it's a little bit "batteries not included" so you need to get some Models for the amp part: https://github.com/pelennor2170/NAM_models and some Impulse Responses (IR files) for the cabinet emulation.

When you put them together you can get some good results, maybe a little bit noisy.

The important part is trying to develop a library of models for plugins to share and when paired with libraries of impulse responses and other FX you can build up common guitar tones. It's not especially user friendly, which is what you pay for with other commercial plugins

The amplifier models are put to use with https://github.com/sdatkinson/NeuralAmpModelerPlugin, which links to videos of demos: https://www.youtube.com/user/RunawayThumbtack

It's still pretty unclear to me what it can and can't do.

Try guitarml, same thing but with everything included

Is there an explanation of what this is, what problems it solves, etc?

I recently got myself a Variax guitar and have been pleasantly surprised at how good it sounds. I've also been using bias FX for years when recording for my indie doom metal. Software really is the next frontier in music performance, and I'm glad someone's doing what I can't be bothered doing and making an open source alternative

I actually wish there was a neural net alternative to IRs, they also just don't sound right to me.