Yeah, I may occasionally charge my camcorder by keeping it plugged into my PC's USB port while I edit videos. And sometimes I let my smartphone plugged into my laptop if I'm working on something. But other than that, I usually use chargers.
I think the lower quality USB wall chargers sometimes are slower than computers' USB ports, with newer versions of USB like USB 3.1, USB Type C can charge faster because it can deliver more watts of power to your devices.