Erin Griffith for PandoDaily:

But, especially with Squarespace 6, Casalena said the platform is ready for adoption from publishers of any size. Version five, while excellent, “wasn’t a developer’s dream come true because they couldn’t get into all the code,” he said. The new version is more open for developers. The company is completely capable of hosting high volume sites and is building out programs comparable to WordPress’s support staff.

I’m beta testing Squarespace 6 and I really like what I see so far. There are some functionality things that I’m not too sure about yet, but I expect this to be a really big rollout.