Earlier quoted context omitted.
In my experience, if you're working on a green-field project, you're working long hours, making very little visible progress, you have to write a lot of code, make important decisions. All the while management is breathing down your neck and asking 'why isn't it ready yet'. Once the thing is shipped, then all the important people come out of the woodwork, who were surely there all along, 'supporting' you from behind…
What dev to do then?
You can build faster now that you ever have: I am building faster than I have in 25 years of engineering. You have more capable support for all the unfamiliar processes of building a business imaginable.
And almost everyone larger than you is finding it harder to achieve similar productivity gains from implementing AI, if not outright struggling with it. This is a golden moment and won't last long.