The entire idea of a modernization project doesn't make sense to me. The author seems to be mixing in the MVP strategy used to validate product-market fit (which still has nothing to do with simple or easy, it's about lowest-cost value demonstration) with some sort of prototyping or technical spiking approach. Neither is pursuing "modernization", which is a valueless idea. You update things like architecture or implementation so that you can DO something with the result. It is not the end production.