He has a history of going over budget and failing to complete his work.
For example, when he was deputy FAA administrator he was tasked with implementing the NextGen air traffic control system. It was supposed to cost $20 billion but when it is finally implemented (perhaps in 2028) it will have cost over $47 billion.
When he was COO of Supernal he was tasked with launching the company's electric vertical take-off and landing (eVTOL) vehicles. By the time he left the company didn't have a commercially viable product and is now estimating it won't until 2028.