If quick and dirty gets you 10 shots, while slow and beautiful gets you 1, I’d choose quick & dirty any day.
The PoC becomes a pilot becomes production becomes an exit becomes someone else’s problem. That’s the SLDC that has gotten us to a place with endless amounts of terrible software everywhere you look.
Though, I’m optimistic that at some point, the software industry will be so saturated, all the products have all the features, and the only place left to differentiate or disrupt will be quality.
That’s basically the only important context. If you can’t deliver that, it doesn’t matter how well thought through, extensible, or scalable it is.