Need clarification on 9.0 FPP & trunking

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Need clarification

I have a XTS 5000 with firmware 9.xx programmed with CPS 9.xx and has Q52 but not Q53
It also has smartzone

So my question is. I read where if you program it with CPS 12.xx you lose FPP and maybe lose some trunking features or programming ability.

So my question is, what options do I have if I want to upgrade the firmware or program with newer CPS?
Does the radio have to be reflashed and take FPP Q52 out completely?
I do need SmartZone trunking to stay. So keeping all trunking features and upgrading the firmware is my goal.
I do not need FPP to stay, but if I can keep it cool. If not no big deal.

Just looking for the best and cheapest route.

Thanks in advance.

[Tom in D.C.]

My understanding of the situation is that when you install firmware above 9 and have FPP you can not program the radio for trunking. Like many of us I have no authorization or need for trunking so my two 5Ks with FPP do just fine with version 12. If I absolutely must monitor a trunked system I put in the digital non-control channels and just scan the system. I have two local trunked systems that run on VHF and UHF and this works okay; not perfect by any means but okay.