This is targeting developers who are already using tried and tested solutions for this kind of problems, which are all open sourced or, if not, well established.
There are dozens of choices for auth, component libraries and any other lego piece you need. And it is very easy to piece them together and have full control.
I would almost never trade small perceived gain in speed of pushing first version of some internal tool, for much much lower flexibility, cost and lockin over life of the project.
This is targeting developers who are already using tried and tested solutions for this kind of problems, which are all open sourced or, if not, well established.
There are dozens of choices for auth, component libraries and any other lego piece you need. And it is very easy to piece them together and have full control.
I would almost never trade small perceived gain in speed of pushing first version of some internal tool, for much much lower flexibility, cost and lockin over life of the project.