Ruby, Python, PHP and Node.js startups have to figure out how to use the cores while C++, Rust, Erlang and Go have no issues running a single process that maxes out all 64 CPU cores.
So it does not work for FAANG companies but what do I care. I have the rest of the world to play with ;)
As long as hype chasers in middle management don't get in the way after convincing themselves they too must be like FAANG with a few orders of magnitude less of a consumer base.
They want to be both the architect and the manager and anything you say would be over ruled and since they are the boss its hard to ignore them.
This service is a monolith because it has 10K code and it needs to be broken up.The product is at MVP and its rock solid on Java Spring and it hardly crashes. We are never going to lose data based on the design choices we made. None of that matters.
We need zero down time upgrade, when we had zero customers.
Instead, if you build an architecture that can scale the number of corporate users by adding cheap $2k pizza box 1u servers as the company grows, that's much more attractive. Also, you can keep your systems design flexible enough to recompile and take advantage of advancements in hardware tech every 18 months – this gives you better operating margins as your own business starts to grow.