Are there any little devices that you'd like to make or tinker with? C/C++ is still big in the embedded space and that's the first use case that comes to mind for me.
I definitely empathize with your post since I haven't done any C++ in 10 years and I'd like to get back into it. The last job I had using it wasn't on C++11 yet and it seems like there's been a whirlwind of progress since then.