I'm just not convinced that's a straightforward question to answer. I once worked for a hardware company that outsourced new hardware development to a contract

I'm just not convinced that's a straightforward question to answer. I once worked for a hardware company that outsourced new hardware development to a contractor. We had a guy in house for maintenance, and the occasional hardware bug that propped up, but we only designed a new box once every 5 years or so... it just didn't make sense to have the team in house. We did manufacturing in house, and we had a huge software team... but though our money came from selling the hardware, we didn't do that in house. As the company grew much larger, we did eventually expand our product line, and did build a team. But for several years, we just had 1 dedicated hardware guy.