"we can’t build everything at once"
Of course you can't. That is not what is being requested. What is being requested is that you have a product that works. Something you should have done before making it available.
Once upon a time, when you published your software, you had to make sure it worked because there was no Internet for you to post updates and leave people to manage themselves. If you failed to ensure your software was functional, you wouldn't sell, end of.
These days, with near-ubiquitous Internet access, you no longer care about making a fully functional product, you only care about making a product function enough - the rest will be dealt with by support team.
One guy working in a basement.
I like my FTTH, but sometimes, I long for the times when I could buy a product and it worked.