>Not a big fan of EUT FRRs.

That's a curious statement. As with most things, EUT FRRs solve a problem. 
If you have the problem, you need them. If you don't have the problem, you 
don't need them. It seems that it is really not a question of being a fan 
or not. Maybe you're not a fan of using FRRs in environments where you 
could use an ESTAEX for such reasons as you want to be able to issue an 
SVC from your recovery routine or you do not want your recovery to get 
control with locks obtained by the mainline in such cases.

>I know that R14 points to the EXIT service call
That is not true for FRRs. 

>It’s a real pain when you want to retry into 64 bit addresses
Given that you have gone to the real pain of using RMODE 64 apparently for 
many cases that are not supported, I'm surprised to see this statement. 
You can set your 64-bit address with bit 63 on into the register 15 retry 
slot of the SDWA (SDWAG6415), use SETRP with RETRY=64,RETRY15=YES , and 
identify a retry address of CVTBSM0F.  I'd call that a relatively minor 
inconvenience; perhaps that's a real pain to you. This has been available 
since z/OS 1.13 which is the first release where RMODE 64 of enabled code 
was tolerated.

Peter Relson
z/OS Core Technology Design

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