I think the reality is that aerospace engineering is literal magic - the amount of resources, facilities, time and brainpower is absolutely it takes to develop

I think the reality is that aerospace engineering is literal magic - the amount of resources, facilities, time and brainpower is absolutely it takes to develop anything approaching modern military hardware in performance makes it prohibitively expensive to fund the development on market terms. Developing a jet engine that could allow Boom to meet its performance targets is a nation-state level endeavor.