Code intrusion problem with Feature flag

How do people feel the current Feature flags developer tools? Do you think the use of feature flags is too invasive and may affect the normal operation of the program? What do you think about Launchdarkly's Code reference feature? Would a code analysis tool to help solve unexpected failures caused by Feature flag be useful? And which scenarios are more tricky? PS：When I promote feature flags to clients, these are the questions that get used the most. Especially in countries that are not familiar with the concept of feature flags (like China)