The kind of website that Squarespace can build for you is definitely a commodity. What isn't a commodity is custom full stack application development, which I have been doing very well with for the last 8 years and see no sign of slowing down. I specialize in Django on the backend and VueJS if needed on the frontend. I've found amazing clients who pay high rates (currently I get $125/hr) for good work, and am able to work part time on that while working on my own business ideas.

I most enjoy working with very small 1-3 person companies so I can be the go-to guy for someone's business. Those jobs tend to be very sticky, and of the 4 clients I currently work with, they've been around for 4 years, 5 years, 1 year, and 8 months respectively, with none of them showing any signs of wanting to boot me.

There is a very high skill ceiling for this kind of work, and I don't think it's getting commoditized anytime soon. The best way to get these kinds of gigs in my view is to network one on one and build relationships and tell people you are available for work.