Perhaps, if helps, is the key feature that you are looking for your Librem 13v4 about how to expand it with few BC 1.2 ports. Its purpose is described here:
And as simple USB-A expansion for your laptop would be something like this device: http://my.orico.cc/goods.php?id=5567 in order to have high rate data transfers while still charging at 1.5A rate (when needed). Same manufacturer provides bigger USB3.0 hubs with more BC1.2 charging ports but this post is more about idea of how someone can expand their data/power hungry needs with their older USB-A only laptops (without the need to buy new one supporting USB-C PD).