It’s the “ask me why” that got you the downvotes. If you had of just stated your reasons without waiting for engagement you probably would have been upvoted.
Your first comment was not in line with HN guidelines. Your second comment is much better because it gives reasons.
I would have downvoted your first (and I do not work for GCP, mind you); I am now inclined not to just because you posted the reasons in your second comment.
Ok, here are some: if you resize your instance you will get a downtime.
There is no support for CDC.
You pay for multi master but failover is painfully slow
If you launch more than one using terraform all except one will fail and will stuck in an unrecoverable state
They broke something last week so our proxies lost connectivity