Once upon a time, by recording a thing you made it durable *by default* and even got a copy you could do with what you liked. Now, recording and sharing words or ideas comes with zero assumption of durability. Your service provider's ToS and business fortunes might support them keeping it around and accessible for now, but there is zero guarantee that will outlast the whims and fortunes of a SaaS providers.
The combination of DRM (to lock down devices) and "everything lives in the cloud" (to keep custodianship and control of data in vendors' hands, not creators') means that without very intentional, often obscure and/or annoying manual steps, your correspondence, recordings, and other creative output will not survive you. Even _with_ painstaking effort there's every chance it won't work.
Personally, I've tried for a couple of years now to get people I work with to write important things down somewhere that isn't Slack, GDocs or another pay-to-play service. Business, personal, silly, whatever: as it stands, all of that culture and history and creativity is just going to go "poof!" as soon as some company's C-suite does the math and decides the storage and compute to make it available don't pencil out any more.
Now I just accept that unless I have 1) a complete, easily-cloned copy of something, 2) that I can access and manipulate using OSS software, 3) on a general-purpose computer I physically control, then that thing is not *mine*. If it isn't mine, I can't decide what happens to it in the near term, much less once I'm not around to lobby for access.