"by stealing features"
Just like Linux was developed to be a feature-by-feature copy of Unix? Just like Android copied Java?
But yes, Linux brought IT thirty years back in the past because someone in the 1990s couldn't develop an OS for the 2000s and just though it was a good idea to copy one from the 1970s - with all its design limitations of the hardware of the era.
Windows 3.1 GUI and applications are still better and more powerful than any Linux GUI and software. Maybe around 2070 we will have a decent Linux OS - as soon as they understand it's time to change.