Mark
I think what you are looking for is the story of what PAfE is/ how you would use it. Having used it since 2018 I haven't seen anything useful so I tell my own story.
After 9 years PAfE is still an unfinished work. IBM took CAfE ( From Cognos) which was a good but limited Excel add-in and brought certain TM1 Perspectives functionality into it. CAfE was different in it's architecture and functionally it used BI standards of MDX and supported the construct of named hierarchies and this was essential to support Server 11.
So the cube viewer, explorations and quick reports came from that world. Dynamic and custom reports and ex Perspectives report functionalty rebuilt in PAfE. But the ex Perspectives stuff does not support hierarchies.
So 7 yeats the only PAfE report type that supported hierarchies was quick reports which are a static layout. in practise very limited.
Going back in 2018 the q3 roadmap had hierarchy aware reporting/ new excel functions but it didn't happen. There was a demonstation of Dynamic Quick Reports with new hierarchy aware custom functions ( looked promising) but that didn't happen. Late 2023 Universal Reports were released with the statement that at some point they would replace Dynamic Reports. Universal Reports are an unfinished work. Stage 1 was dynamic x and y axis reporting (Dynamic/ex Active Forms only support dynamic Y axis). Stage 2 was Static layout, the idea I believe was to support a simple static layout similar to Quick Reports which has been stated will be sunset. The roadmap shows what I expect is stage 3 which is inclusion of custom Excel Formulae in dynamic UR rows/columns and there also seems to be a new idea of standard formulae for use in the viewer, exploratiins and UR.
So then what's missing in order to get rid of dynamic reports and the old custom DBRW based reporting? Nothing has been articulated.
There are no hierarchy capable custom functions equivalent to ELLEV etc. There are several hierarchy aware custom functions that have been introduced over the last 2-3 years. TM1SET, TM1VAL, DEFINECALC and some used in UR. These are useful and powerful but not sufficient to provide a hierarchy aware equivalent to the 30 yr old Perspectives functions.
Dors that leave you confused? If so, then I'd say it's as clear to you as the rest of us. If you are not using hierarchies then stick with dynamic / custom reporting and you can use Explorations (Effectively an in spreadsheet browser) and UR where beneficial. if you are using hierarchies then hopefully this quarter sees the reveal of addition UR functionality which may make UR far more useful. Assuming that addition custom functions are provided then it may be possible one day to stop using dynamic reports and the old functions and just use UR and hierarchy aware custom functions.
I hope this helps
John