Specialization is for insects.
Mike can dive into a complex technology, spend a few weeks on it, understand it in a way that makes it clear to others why the technology is worth adopting, and overcome the hurdles to do so.
Mike is one of those rare people who can mold himself to whatever the team needs to be successful. He has always been a prime influencer and leader, despite being a remote worker.
Mike is smart and hardworking. His willingness to help others, technical expertise, ability to get things done and think through complex problems made him awesome to work with.
I have never known Mike to be short on technical expertise. From defining a product, building the architecture, and laying out the roadmap, Mike has demonstrated strong skills.