Concord is Sony's biggest failure in gaming history.

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https://www.vgchartz.com/article/463026/sony-discusses-what-lessons-can-be-learned-from-the-failure-of-concord/

Sony's Investor Q&A discussing the game's failure:

"We probably need to have a lot of gates, including user testing or internal evaluation, and the timing of such gates. And then we need to bring them forward, and we should have done those gates much earlier than we did."

"We intend to build on an optimum title portfolio during the current mid-range plan period that combines single-player games – which are our strengths and which have a higher predictability of becoming hits due to our proven IP – with live-service games that pursue upside while taking on a certain amount of risk upon release."