I started off in the software field as a developer. I've been in the software field for almost 10 years but I've only actually spent two years as a full time developer. I've also done project management, product management, marketing, customer support, and management. I find myself struggling to fill one of those individual roles because I don't have the same level of experience as those who have dedicated themselves to those for the full ten years.
I'm currently a VP of Engineering for a small company. I know most would probably say that I've made it, but I'm looking for my next opportunity and struggling. It's hard to get a job at a larger (200+ employee) company as each role filled is expected to be specialized and focused. At a smaller company or startup, though, I kick the crap out of anyone else applying because I know so much more about the business in general and can wear many different hats.
In addition, I feel a strong benefit is that my experience enhances my ability in each other role. For instance, if I'm working on a marketing email campaign, I can use my developer skills to pull relevant data from the application that helps me focus my targeting. If I'm developing, I will specifically build small helpful tools for customer support and marketing departments because I already know what they want and they don't know they can have it. It takes a small amount of time but provides a big value.
I would probably also have a leg up on starting my own business compared to someone who has a deep specialized knowledge of enterprise level applications but no idea how to put together a customer support and good user experience.
Still, we are always looking at the greener grass, and there are times when I wish I could just apply for a senior developer role at a larger company and focus on one thing. Somehow, I don't think that my lack of React experience will be made up for by letting them know that I will be able to directly interact with the customers or set up marketing campaigns. They already have 5+ people doing those things.