The shift towards three-tier applications is being scrutinized as many developers question the necessity and efficiency of microservices architectures. While microservices can offer scalability, they often come with increased complexity and maintenance costs. Some developers advocate for simpler, monolithic architectures, emphasizing that newer isn't always better. Notably, a case highlighted indicates a successful transition from a complex microservices architecture to a more streamlined monolith, resulting in significant cost reductions and improved performance. It's suggested that microservices should only be used when justified by actual usage and performance data, rather than defaulting to trends.