This is one of the points Marcello is making. I have almost 20 years experience, spent 5 years at Microsoft, 18 months on the .Net framework team before it released, and have yet to write a line of code for the web.
The vast majority of work at MS is not web based, its API, OS, Dev Tools, Server, etc ... And devs are very much in silos. (IOW they 'own' a specific piece of functionality within their product.)
Internal Tool devs on the other hand ... Internal Tool teams are run very much like startups and many fail. ;)
BTW there is a lot of grey here, its not black and white. There are many devs at MS that do side projects and contribute to OSS. Many do this work off the MS stack.
The vast majority of work at MS is not web based, its API, OS, Dev Tools, Server, etc ... And devs are very much in silos. (IOW they 'own' a specific piece of functionality within their product.)
Internal Tool devs on the other hand ... Internal Tool teams are run very much like startups and many fail. ;)
BTW there is a lot of grey here, its not black and white. There are many devs at MS that do side projects and contribute to OSS. Many do this work off the MS stack.