I think the biggest road block for air taxis is airspace. There is only a limited amount of it especially in large metro. areas and the larger aircraft will/should get the priority. A jet carrying 5 passengers takes up as much space in the ATC system as a jet carrying 50-100 passengers. The economics of the VLJ’s won’t make them a priority in future plans for ATC. I think governments would rather have a viable airline industry rather than air taxi.