This XDA blog How A/B Partitions and Seamless Updates Affect Custom Development on XDA has some Q&A's, of which :
- My device supports A/B partitions, does that mean I can make use of a Project Treble Generic System Image?
Not necessarily. Project Treble and A/B support are unrelated. The Motorola Moto Z2 Force doesn’t support Project Treble, yet it supports the A/B partition scheme.
- My device supports Project Treble, does that mean I have an A/B partition scheme?
This is not always the case. The Honor 9 Lite is a prime example as it supports Project Treble yet does not have an A/B partition scheme.
(Emphasis added)
I thought Treble and A/B devices are synonymous in the sense having one implied other. That's not the case
Why is this? What are the differences?