I’m not saying it’s impossible but that it commonly fails due to those reasons. Timezones are a common source of problems but I’ve also seen a fair number of problems which basically boiled down to outsourcing putting more stress on existing management problems such as inability to produce specs or delegate, and micromanagement were amplified by distance and cultural barriers. Basically the organizational equivalent of saying “our monolith sucks, let’s use microservices” without first contemplating how the existing system got that way.