I started a few projects from scratch... with stricter financial restrictions as well. Splitting up the storage and execution between cloud providers was clear

I started a few projects from scratch... with stricter financial restrictions as well. Splitting up the storage and execution between cloud providers was clearly an early cost optimization. Then this cost optimization was to fix with the result of the previous cost optimization. Adding more code that has no clear end value to your service* never makes anything more stable. Now OP has to maintain three things, instead of two. It's a classic "look at how smart I am" overengineering. *- OPs customers definitely give 0 f's if everything is on AWS or split between AWS and DO.