Why would you shrink the team rather than become 20x more productive as a whole?
Either way can work. It depends on what the rest of the business needs.
Users don't want changes that rapidly. There's not enough people on the product team to design 20x more features. 20x more features means 400x more cross-team coordination. There's only positive marginal ROI for maybe 1.5-2x even if development is very cheap.