You must however be careful of solutions which "hobble" PFCG and perform direct updates to the AGR* tables. These will be blocked in future via the package interface concept and you cannot rollback to normal PFCG maintenance -> you have to start over without the tool.
? This statement is really not correct Julius, PFCG is still being used, well at least it is for the CSI tooling, I can't tell about other parties. If companies want to decide to no longer use the tooling they can just stop using at and continue in SAP.
I strongly recommend that if you want to use such tools, then you should acquire them via SAP services contracts for partner products and not external bespoke tools. External besproke tools can be SAP partners as well Julius...