Fully reusable rockets making orbital access as routine as commercial aviation.
Launch costs are the fundamental tax on everything humanity wants to do in space. Vehicle amortization and range fees compound into a ceiling that gates every space business and research program. Stoke is building Nova — the first orbital rocket designed for 100% stage recovery, including the upper stage, which no launch provider has successfully recovered and reused. Nova is designed to fly multiple times per day, not once per mission.
Reusability has been proven at the booster stage. The upper stage — responsible for the majority of vehicle cost — remains the unsolved problem in launch economics. Full-flow staged combustion engines, metallic regeneratively-cooled heat shields, and modern computational aerodynamics have matured to the point where upper-stage recovery is an engineering challenge, not a physics one.