Nice concept, why flask though? Just for iteration speed? Because Python in almost 2026 is probably one of the worst choices for a web server, right after Javascript...
So quick iterations and rebuild once the SaaS has to scale I guess?
There are many node/js alternatives, nice to have one for the Python devs
For 99% of the SaaS teams, low latency becomes an issue later unless the product itself needs to be catering with that feature. Focus with kits like this is to get everything running on day 0.
Not OP but I think it's a bit harsh on flask tbh.
If you want to validate a product or run with a few K users (which I think this is helping), I really think that flask is a proven WS framework that just works.