How do you handle microservice configuration, anyway?

hey everyone, im curious about how you all handle configuration for your microservices. were moving towards a more distributed setup and managing env variables across many services is getting tricky. are you using a dedicated config server like Spring Cloud Config or HashiCorp Consul, or are you sticking with simpler solutions like .env files managed by your deployment pipeline? what are the pros and cons youve seen with your approach, especially regarding dynamic updates and security?