The ISS is nearing retirement, so why is NASA still gung-ho about Starliner?
Briefly

NASA is determined to support Boeing's Starliner program, which has faced numerous delays and challenges since its inception. Boeing, which has incurred over $2 billion in costs due to these setbacks, is implementing changes to the Starliner spacecraft to fix issues such as helium leaks and thruster overheating. The next flight is expected to be a cargo delivery to the ISS rather than transporting astronauts. NASA aims to initiate crew rotation flights possibly by the end of next year, which would be significantly later than originally planned.
NASA is committed to ensuring Boeing does not abandon the Starliner program, despite significant delays and difficulties since its announcement in 2010.
Boeing is making necessary changes to the Starliner spacecraft after encountering problems during a test flight to the ISS, aiming to resolve issues with helium leaks and overheating thrusters.
Read at Ars Technica
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