Master planning has never worked for my side projects unless I am building the exact replica of what I've done in the past. The most important decisions are mad

Master planning has never worked for my side projects unless I am building the exact replica of what I've done in the past. The most important decisions are made while I'm deep in the code base and I have a better understanding of the tradeoffs. I think that's why startups have such an edge over big companies. They can just build and iterate while the big company gets caught up in month-long review processes.