I build on Squarespace 7.1 every week. I've built over 600 sites on this platform. I'm committed to it. I recommend it to most clients. But I'm not going to pretend it's perfect, and I'm not going to be a tribal evangelist defending every design decision.

A store that exists and a store that sells are two different things. I've seen Squarespace stores that look beautiful but convert terribly. I've seen basic-looking stores that move product consistently. The difference isn't always obvious, but it's predictable.