This is an interesting issue that I've also seen across many companies - often even leading to low usage of these slow-to-bring-up environments. At relatively smaller scale, I can see physical infrastructure-based isolation being effective to solve it - with the stack coming up relatively quickly, but at larger scale (even 30+ microservices), I think an approach that uses logical / request tenancy is also worth considering - similar to https://www.uber.com/blog/simplifying-developer-testing-thro....
