5

As @brother said, it’s supported, but not in the way it should be. The NOR flash is only 16MB, just enough to fit the base system. The AR750s on the GL firmware uses the secondary 128MB NAND flash to store the data. This is the issue with the OpenWRT “vanilla” version, they have not implemented support for the secondary memory yet. Patches have been in place, but the OpenWRT team decided that the way GL creates the partition table on the device was not set up as they liked and decided to drop automatic builds until a fix was made. This is where the “dropped from the openwrt tree” comes from.

The OpenWRT team has been known to make decisions like this in the past, so much so that half the team decided to start their own project (what was called LEDE) where the team had more rational decisions. After LEDE and OpenWRT decided to merge back again, things have reverted back to being rocky. It is very hard for patches to be merged in now (just as it takes the OpenWRT team 6 or more months to just even look at the patch, then another 6 months of back and forth nit picking of things they want fixed before a merge).

On top of that, the quality of the recent 19 release has not been up to par. As discussed in other threads, random crashes were introduced, so updates for the GL firmwares to 19 were put on hold until those issues were fixed in the OpenWRT end. There is no point in release a firmware that has known crashes, and causing confusion for users.