I honestly don't know. But from my perspective, this year I've spent probably in excess of 1000 hours working on my SaaS app, by contrast it took me maybe 3 days to setup all the required services to connect to Stripe, my analytics provider, etc.
Simply put, saving a few days of setup time does not cross the threshold of a product or service I would pay for. If this was something that would take me a few weeks or a month to put together myself then it would be a product I'd be willing to pay for.
Take a product like TailwindUI, it's expensive but also very worth it because it takes the time to build a professional landing page from 2-3 weeks of work down to 2-3 days of work.
This is a huge problem in the tech world I think. I think of myself as $30/hour against purchases and subscriptions - each hour something saves me is worth $30.
This boilerkit is worth $39 to me because it would definitely take me longer than a couple hours to build myself. Someone else has already put in the 100 to 1000 hours to make it a decent experience.