Where is the ath79 build for wndr3800ch?

But before it is merged it is better to test flashing from factory to Openwrt.

FYI, the current ath79 wndr3800 snapshot returns this on wndr3800ch:

sysupgrade -v /tmp/openwrt-ath79-generic-netgear_wndr3800-squashfs-sysupgrade.bin
Device wndr3700 not supported by this image
Supported devices: netgear,wndr3800 wndr3800
Image check 'fwtool_check_image' failed.

Is it advisable to use the -F option, as suggested in this previous thread? Porting guide ar71xx to ath79?

Yes you have to use -F to go from ar71xx to ath79. -n is also advisable to make the firstboot scripts rebuild the default config files, as some things related to wifi and possibly other systems will be different. sysupgrade -n of course erases your configuration.

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Would I be able to restore from backed-up ar71xx config, after using -n?

Mostly. Watch out for the wifi "path" being different, and the switch config could be a different format as well. Be prepared to not have wifi access after flashing.

A backed up config is just a tar file of the config files, so you can examine them offline.

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