I think it's too ingrained in our software ecosystem / landscape as free software to bother trying to charge for it. But as other commenters have said, if you

I think it's too ingrained in our software ecosystem / landscape as free software to bother trying to charge for it. But as other commenters have said, if you offered something of really high quality with integrations to other software then I could see it being possible. I myself don't know what that looks like, so perhaps the Steve Jobs quote applies here: "People don't know what they want until you show it to them".