Developer reliance on APIs increased over the past year amidst the global pandemic and will continue to increase in 2021, a RapidAPI survey reveals. API testing and security were top concerns among survey respondents. JavaScript continues to be the most popular programming language, with Python, Java, PHP, and C# leading the list. API technology and usage are becoming more varied, and there was strong interest in emerging technologies like serverless, FaaS, WebSockets, and gRPC. More than half of professional developers spend 10+ hours a week working on APIs.
Source: https://www.helpnetsecurity.com/2021/02/05/api-adoption-2021/