> Unfortunately this isn't really true for large and complex FLOSS, e.g. web browsers.
It is also true for web browsers; all it needs is one developer among the many thousands being able to build and distribute it.
> Open-source doesn't necessarily mean easy to take control
True, it should be more something like: "it won't be easy to use this source by yourself, but if the company decides to discontinue the product, you can still hire some developers to support and continue it, rather than throw in the trash everything you've based on it, which sometimes could mean your entire business". It rather makes hard for others to take away this control, a concept which is wonderfully explained by the GPL license document.
> I've been RE'ing for decades and wish more people knew about this valuable skill, because that's what gives you the true power to take control.
Agree 100% on this, but definitely not easy especially now that pretty much every damn product contains more horsepower and complexity than the Apollo missions computers.
However, if you have books, resources, examples etc. for mere mortals on the subject, I'd love to take a look at them. That topic would probably deserve a post by itself.