"Well, the reasons streaming services do this are numerous, but often it's about money. If a show isn't very popular and isn't helping attract subscribers or retain them, it makes more financial sense to decommission it. This means future residuals don't have to be paid to actors and other eligible creators, and you can get a nice big tax write-off for the money you spent on an underperforming show."

https://www.howtogeek.com/what-happens-when-streaming-services-start-deleting-their-own-movies-and-shows/

imagine you buy a company and its catalogue. if HBO has a more generous residuals compensation plan than netflix "wants", it could make sense to quietly hatchet content that does not draw enough streams or attention to justify the administrative overhead of keeping it available. and since its their content they couldn't lose it to the competition either. it just quietly goes away while the streamer advertises the latest True Crime / Storage Wars crossover or AI scripted Jane Austen knock off with sexy people they farted out for $10K an episode.

it could also be a way to force a renegotiation with original creators to accept shittier terms for keeping the older content up.

anyway, i do not trust the logic of the boardroom to preserve anything.