It also led to some interesting improvisations. NASA has a requirement that there be a 'lifeboat' on the ISS for all crew in case of an emergency, but because of the Boeing crew (and the lack of a corresponding vessel), NASA approved a new 'configuration' of the Dragon where up to 3 people could strap themselves to the floor of it, where cargo would normally go, in case of the need of a mass escape from the ISS. [2]
As another fun aside, when the Starliner was returning [autonomously] to Earth it experienced two more errors, unrelated to the ones that left the astronauts stranded on the ISS in the first place. What a vessel.
[1] - https://en.wikipedia.org/wiki/SpaceX_Crew-9
[2] - https://en.wikipedia.org/wiki/Boeing_Crew_Flight_Test#Uncrew...