That yes, because RFD was a common way to get 5D but that's being nuked and looks like standards will become stricter on what actual qualifies as RFD.
Like uncountably infinite universes through infinite multiverses is now also unusable because there are various circumstances you need to prove fir it ti je 5D
And hypertimeline logic... as we shoukd all be aware of... is a hassle and pain to prove
Also, being infinitely larger than a 2-A structure will mo longer automatically be 5D without more context
Additionally a realm or being seeing other universes as stars, lights, galaxies, atoms, etc isn't 5D anymore either without more provable context
All on all, it's getting almost impossible to ne any tier beyond 5D without being marvel , DC, WoD, MG, etc
Edit: I say regression because it looks like the OG Type 5 AC, Type 1 CM, that special version of NEP and 1-A only Transduality might be coming back too
Edit 2: proving higher temporal dimensions has always been a headache