How much flash space should I reserve for device tree blobs?

[Brian Hutchinson]

Reflecting back on the famous quote of "Nobody needs more than 640K",
how much space should I reserve in flash to 'future proof' my MTD map
in regards to dtb's?

Looking at the current flavors of dtb's built in a recent mainline
kernel, the biggest one I see is 66K.

How big do you all see these getting?  I know, it's probably a loaded
question.  Would just like to bounce this off the list as a sanity
check ... measure twice cut once kind of thing.

Regards,

Brian