How fast do your web pages load on the client side, especially the portal or login pages? And how do you detect unexpected 302, 404 or 5XX responses? It would probably hurt your user experience or even the functionalities. Slow or problematic page loading is always bad.
If you have examined that carefully, that’s good. And most likely, you were met with multiple, unpleasant manual steps. The thing is how can you be so sure that it’s always good. Even with the endless code changes.