They don't host a content editing UI, only a "dynamic" version of the site that you can embed or link in a CMS for draft previews etc.
I use and like gatsby a lot and don't think it is generally overcomplicated for what it does. They are really pushing static at all costs though, and these cloud solutions are needed because of that.
When seriously evaluting a 100.000 pages / dozens of editors project, if you ask what the benefits and the costs of static really are, I think you might come up with a different answer than Gatsby Inc. I think Zeit+Next actually has a better story there, because its not "static at all costs".
I use and like gatsby a lot and don't think it is generally overcomplicated for what it does. They are really pushing static at all costs though, and these cloud solutions are needed because of that. When seriously evaluting a 100.000 pages / dozens of editors project, if you ask what the benefits and the costs of static really are, I think you might come up with a different answer than Gatsby Inc. I think Zeit+Next actually has a better story there, because its not "static at all costs".