I suppose it depends. If a company can show impressive growth with a small staff, that's the ideal. But at that point the market/investors will probably ask "if you can sustain this kind of growth without many employees, why don't you hire a bunch and grow even faster?" Of course, that's not necessarily how it will play out (mythical man-month, market size, sales capacity, etc.), but the investors will still get itchy.
A growth mindset is great for an individual, but not a business or whole-scale economy.
I worked as the only developer at one company, one of 5 at another, and one of 50 at the last. The small team is ideal: division of labor, but everyone still kind of knows everything about the whole software package.
