> Most people can't justify the time commitment needed to read and then modify the code for tools they use very often.

As someone who way long before the LLM age had small patches accepted in several dozens of projects I've been using, I can assure you that this is just a matter of mentality. All I needed to be able to do that was to stop thinking that "nobody has done it so far, so it must be hard" and just do it. Sometimes I failed, but more often than not it turned out it wasn't hard at all and nobody has done it so far simply because nobody cared enough to attempt it.

> Getting software to compile in order to start hacking on it used to be enough friction that I often wouldn't bother.

Not my experience at all. Usually the only limiting factor is the size of the project. Compiling a web browser on my 7 yo 13" laptop is a miserable experience, but compiling most of the desktop components or utilities is and has always been a breeze and, in my experience with both Debian and Arch, just a matter of grabbing the distro's source package. I even do it on my phone these days.