Nothing comes free. Everything has its downside or at least some challenges that need to deal with. If we go for microservices, it has its own challenges. So, let's look at them and discuss how they can be minimized if there is trade-off.
Although you don't have to update your infrastructure every day, it still needs to be maintained and it needs more effort. Technology freedom comes with microservices, but without any cost. You have to maintain different server instances using different technologies. This will need better infrastructure and people with experience of more technologies.
Actually, you don't always need better infrastructure and people with knowledge of all those different technologies. Normally, every team working on different services will have its own infrastructure or Dev-ops-related people. However, in that case, you need more people because now, you are not sharing Dev-ops or infrastructure-related people across different...