Too much of anything sucks. Too big of a monolith? Sucks. Too many microservices? Sucks. Getting the right balance is HARD.

Plus, it's ALWAYS easier/better to run v2 of something when you completely re-write v1 from scratch. The article could have just as easily been "Why Segment moved from 100 microservices to 5" or "Why Segment rewrote every microservice". The benefits of hindsight and real-world data shouldn't be undersold.

At the end of the day, write something, get it out there. Make decisions, accept some of them will be wrong. Be willing to correct for those mistakes or at least accept they will be a pain for a while.

In short: No matter what you do the first time around... it's wrong.