Sadly, that’s very true. Monzo have made it very clear, that they never want to release “full joint accounts”.
However, even with regards to shared pots this is still very true:
I just realised that “payment reactions”, which were “easy” and “quick”, took almost a year from sneak peek to announcement.
So, I guess, I’ll go back to bed now. Nothing to see here for the foreseeable future. (keep in mind that joint accounts are, as @alexs keeps telling us, sooo complicated 
)