Just because you are using UE5 doesn’t mean you have to use the all the bleeding edge features contained with in it.
I turned on what I needed but turned off what I didn’t “sort of a UE4.27.2” mode. The biggest disappointment / change for me is the lack of a APEX to CHAOS converter and the Cascade to Niagara converter crashing on every effect or not producing the desired results or anything close.
If you have a lot of APEX objects or an entire lib of VFX’s that you don’t have time to redo them all stay with Cascade / APEX to ship or don’t switch engines stay on 4.27.2.