I don't think anything has changed. For years now, Apple has claimed
that you don't need to force close your apps, and this makes sense,
since why would a company develop a multitasking operating system if it
can't manage resources across multiple apps? That doesn't mean people
won't claim
If you really want to know what is “best”, then you could call Apple, assuming
Apple always knows best.
I personally go by what seems to work best on my specific device.
I don’t mean that to sound negative, I usually go with what Apple says.
Someone on the list earlier said that Apple now