The interesting thing about the tech industry is,
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Some might assume that in the pharma space as well.
Smaller companies can innovate faster and try many things quicker than large corporations. Small companies, while they have financial constraints, are not bogged down by big corporate policies and bureaucracy. You don't need to get 20 people aligned to make a decision as one example.
Big companies will let the small companies do the work and at some point, look to acquire them. Much easier than them trying out 10,000 things to find the 10 things that work. This point is apparent when you look at the acquisition history of any of them. It's part of their overall strategy. Buy and integrate, rather than build.