BigCos won't let their employees use these tools to write code because you can't let code leak off prem. To keep from falling behind I use it on my weekend proj

BigCos won't let their employees use these tools to write code because you can't let code leak off prem. To keep from falling behind I use it on my weekend projects. I sense no urgency to remedy this inside, but I'm not sure how these tools would help with millions of lines of legacy code. They are awesome for creating new things or editing small things where you can build up context easily.