These "we moved from X to Y" posts are like Dunning-Kruger humblebrags. Yes, we all lack information and make mistakes. But there's never an explanation in these posts of how they've determined their new decision is any less erroneous than their old decision. It's like they threw darts at a wall and said "cool, that's our new system design (and SDLC)". If you have not built it yourself before, and have not studied in depth an identical system, just assume you are doing the wrong thing. Otherwise you are running towards another Dunning-Kruger pit.

If you have a company that writes software, please ask a professional software/systems architect to review your plans before you build. The initial decisions here would be a huge red flag to any experienced architect, and the subsequent decisions are full of hidden traps, and are setting them up for more failure. If you don't already have a very skilled architect on staff (99% chance you don't) you need to find one and consult with them. Otherwise your business will suffer from being trapped in unnecessary time-consuming expensive rework, or worse, the whole thing collapsing.