It is a shame that so many companies try to scale by just hiring a lot of people, the more people you have in a single project the more overengineering you will end up with.

Some of it is consequence of managing so many individual contributors, I still believe a lot of companies use microservice stuff as a way to scale to more teams than to more scalability/reliability/observability.

Some of it is just people coming up with clever solutions (and leaving after the fact) and a lot from resume-driven development.