There was a paper I saw a few years ago that showed a high correlation between the diversity of a lab (racial, cultural, income, political, age, anything they thought to measure) and citations of published work.
My personal experience is the more diverse a team in software, the fewer blind spots the product will have. This might not be something you always care about, but I think in general it leads to better products, since all that input can be very valuable. I would say by the time you have 30 employees you have had a lot of opportunities to not hire an echochamber. Of course you’ll get some diversity just by hiring different roles. Even just having senior and junior devs rubbing elbows is a good start for diversity, and even if it doesn’t make your product better, you’ll find the two groups have different tasks that are morale tarpits, and you’ll tend to have a happier team.
My personal experience is the more diverse a team in software, the fewer blind spots the product will have. This might not be something you always care about, but I think in general it leads to better products, since all that input can be very valuable. I would say by the time you have 30 employees you have had a lot of opportunities to not hire an echochamber. Of course you’ll get some diversity just by hiring different roles. Even just having senior and junior devs rubbing elbows is a good start for diversity, and even if it doesn’t make your product better, you’ll find the two groups have different tasks that are morale tarpits, and you’ll tend to have a happier team.