Pretty much any app that's been around a while will have all kinds of advanced features that the average user will never use, and eventually becomes detrimental. Hence there's always a group of users and product managers asking to rewrite the app to focus on "the basics".

There's all flavors of "lite" apps and Firefox started as a stripped down version of Netscape.

A lot of older email apps have a prominent "offline" mode that if you accidentally activate it, basically stops the app from sending or receiving any email. I guess a lot of executives demanded the feature because they were handling all their email while on a plane without connectivity.