Source available doesn't allow you to build on that software or patch it the way you see fit.
Heck, even some source available licenses doesn't allow you to compile that thing, let alone get parts and use it elsewhere.
However, I somewhat like source available licenses currently, because they're neat little mines that sneak in to training sets of generative AI models and make the models less suitable for serious work.
How does it make the models less suitable? Wouldn't more high quality source code help improve it? If it was closed source entirely it couldn't be trained on.
If it’s trained on proprietary software and then injects non-Free code into your project, you may have all kinds of unplanned legal exposure. That’s what makes such a model less suitable.
Heck, even some source available licenses doesn't allow you to compile that thing, let alone get parts and use it elsewhere.
However, I somewhat like source available licenses currently, because they're neat little mines that sneak in to training sets of generative AI models and make the models less suitable for serious work.