ChangeEventPolicy vs partial triggers - are they mutely exclusive?

Under section 24.4.3 of the 11.1.2 Fusion Guide, the guide has the following to say about the changeEventPolicy property:
"When you create a form, setting up PPR to work for all the components in the form can be time consuming and error prone. To alleviate this, you can set the changeEventPolicy attribute to ppr on value bindings. Doing so means that anytime the associated component’s value changes as a result of backend business logic, the component will be automatically rerendered. You can also set an iterator binding’s changeEventPolicy to ppr. When you do this, any action or value binding associated with the iterator will act as though its changeEventPolicy is set to PPR. This allows entire forms to use PPR without your having to configure each component separately."
Fair enough, this property can save us setting up our own partial triggers.
What isn't clear to me, is are they mutely exclusive? If changeEventPolicy is set to PPR, can we/should we still use partial triggers on the same page? I ask because I know it's easy to accidentally setup a circular partial triggers scenario which causes the application to break, so presumably with a combination of changeEventPolicy=PPR and partial triggers the same problem can occur.
Does anyone have any opinions or advice to share please?
Thanks,
CM.

changeEventPolicy=ppr affects only fields that are databound to binding attributes associated with this certain ppr'ed iterator.
If you have other UI components that are dependant on some databound fields but do not bind to such, they will not be notified of changes unless they point to them using partial triggers. This usecase still requires partial triggers.
One will also need to use them and change changeEventPolicy to none if he or she has some advanced field dependency where some fields have require update only after certain field is changed or in a specific order.
Change event policy also alters other behaviours significantly. I am not sure if this is what should happen, bet if you have a form for a record including some af:selectOneChoice components bound to required attributes, ADF will warn user about them after EACH edit of any field that binds to a PPR'ed iterator. Let's say you have 4 af:inputText's and 4 selectOneChoice's. User gets 4 messages 4 times - after each inputText loses focus. And each of the messages will warn about 4 fields (soc'es) that "must have a value". This is certainly annoying to users.
There are many more cases where changing changeEventPolicy to none solves mysterious problems - dependant LOV's, showPrintablePage or other "operation" behaviours.
And yes, ppr'ing everything imposes notable impact on performance. Though I can't prove it easily, but it really feels different on weblogic instances running in slow machines (say 4 years old laptop).

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<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.0"
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