Ten years ago I worked on a monster that was half a gig on checkout. Assets, everything. It was an e-commerce site. And it was beautiful. Single set of dependencies, easily tested, one CI/CD pipeline.

It was an egregious Spring/Struts1 app, and it was a breeze to develop on. Fixed my first bug on day 2 of the job. With microservices, would have taken me 3 months.