I've always found that approach fairly insane. The Enterprise shops where I've done Sharepoint work and consulting always followed a strategy that SharePoint is good at its built-in features, but if you even think about writing .NET code to enhance it, just walk away from SharePoint and go write an app.
I am using Sharepoint as a front end development platform. I am working in a secure environment where the installation of software is forbidden. Sharepoint lists provide me a database, REST API, and forms. Yes there are extreme limitations in this approach but I have made it work for me to provide some layer of accounting and analysis and just about everything is customizable with just a little bit of JavaScript