If the only problem is that you can’t use dynamic linking (or otherwise make relinking possible), you still can legally use LGPL libraries. As long as you license the project using that library as GPL or LGPL as well.
However, those platforms tend to be a problem for GPL in other ways. GPL has long been known to conflict with Apple’s App Store and similar services, for example, because the GPL forbids imposing extra limits that restrict user freedom and those stores have a terms of service that does exactly that.
“not updated in years” didn’t used to be considered a bad thing. Why is it one now?
If something works well for me as it is and runs locally in a way that doesn’t open itself up to remote exploits, I don’t necessarily need it to keep changing all the time. Even if it would be nice if it had more features, the software works fine for me as it is. I don’t need those updates now or this year.
The only true “need” is that it doesn’t stop working for me when the various platforms or compilers change. I used to use a Python2 program, and I could keep using it for about a decade after its last update, but eventually I did need to move past it because Python3 had long since replaced it and distros stopped shipping Python2. A year or two of no updates it’s nothing.