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Matter on the nRF52840: Is 1MB a safe bet?

Building the default binary of the Matter example all-cluster-app for the nRF52840 results in a binary of more than 900kB. Switching the optimization from min-size to debug-friendly exceeds the 1MB of available flash, building it using the overlay-low_power.conf overlay gets the size down to ~750 kB.

Does Nordic consider the nRf52840s internal flash (1MB) to be big enough to support Matter and leaving 250+ kB space for the application itself in the long run? Will Nordic put efforts into keeping or even lowering the memory footprint to stay well below 750kB?

Background: Considering to switch from two 500kB internal partitions (A/B) to having the full internal flash available for program code, and adding an external 8Mbit flash for storing updates.

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