For all we know, the C70 could've been a knee-jerk reaction to the A7siii; finding what technology was in development, mashing up a product, and figuring out production. I think an article was posted here where Canon talked about how they quickly made the C70. [someone correct me if I'm wrong]
"Pivoting quickly" is a term that I'm hearing more and more in my meetings and with tightened budgets and deadlines becoming the norm, it seems that all companies must adapt to address this new "knee-jerk" economy we're in.