I built and sold a startup with fractional hires
blog.parttimetech.io
blog.parttimetech.io
If I can get a talented senior developer to contribute meaningfully on a fractional basis, that's a win over starting from scratch with a junior person almost every time. Of course you have to build up a team and include a range of experience and skill levers over time - but I think this is a great way for teams to grow.
I think founders who can break out of traditional thinking, following trends, and can be creative and flexible in hiring are good bets to win in the long run.