There are multiple models (markets) even in today's world, and they have different needs and constraints. When you have lots of space but not a lot of money, yo

There are multiple models (markets) even in today's world, and they have different needs and constraints. When you have lots of space but not a lot of money, you probably optimize for least money per unit of energy. When you have money but limited space (skyscraper rooftop, spacecraft), you might want the most energy per unit of area. And there are times when you need a secondary non-grid solution for redundant backup, so reliability matters more than other factors. Different technologies with different pros/cons could be best for different markets.