Right now I'd typically spin up a quick rails and/or react app for that, so I'm excited to see how Anvil compares. Personally I wish it supported Ruby, but I understand why you'd start with Python.
The number of tools that try to do something like this keeps growing (Bubble comes to mind, or Appian in a slightly more enterprise space), and for good reason. This space is all about execution really--I suspect within the next 5 years or so it'll become pretty easy and mainstream for semi-technical folks to easily create a web app, and I'll be interested to see what that solution looks like.