I asked Tidal to expand on the why. Not the most satisfying answer, but I thought this was a fun sentence:
We can confirm that since your account was activated with TIDAL Direct billing, you can still use the Plex app, and since the partnership will be concluded at some point, it won’t work any more.
🤦♂️
Alternatively, if they are happy with their pro-grums, familiar with the interface, and not getting gouged worse than the next cable subscriber — consider letting it rest.
From things like being able to punch in a channel number to having the cable company to call for issues, folks in that generation might really prefer paying.
I’m basing this on my years of experience with a now 60-something and now 80-something. YMMV