I felt like I could have built out the project in a weekend with php, and I don't even know much php.
But then, in the "productionalization step" there was a lot of leverage from being at bigCo. I could get it internationalized super easily. I got security, encryption keys, done. I got a hostname with a few clicks. I got redundant deployments, and separate release / dev environments. I have metrics and monitoring. My DB is backed up and region sharded and all kinds of stuff I don't care about. Users can delete their accounts and my db can get purged.
So building the "demo" version felt a lot slower, but transitioning it to the production version was a lot faster than me working on my own.