All work needs to create value and opportunity for easily building new functionality. Pick the best tool for the job. Uniformity of tools in big organisations might be necessary. Startups have no legacy. So choose wisely. Picking a Programming language follows the same rule. For data / file work Python is fine, for web or backoffice C#/.NET offers integrated stack to accomplish results fast while taking care of performance and basic security, for distributed content creation WordPress is a solution. Don’t feel the need to go with a single vendor or open-source. Also remember that some components of the stack are easier to replace.