怎么没有分层架构和COLA了？

[coderzcr]

Describe what problem you have encountered
应用架构之前还有分层架构和COLA，现在只剩了单模块和MVC架构。我想使用之前的分层架构，请问如何使用？ 请帮我翻译成英文

Before application architecture, there were also layered architecture and COLA, but now only single-module and MVC architecture remain. I want to use the previous layered architecture, so how can I use it?