Another win. It can be difficult to get newer versions onto some older devices due to onboard flash size and RAM size.
When doing a network boot you will load the entire OS into memory, including the file system containing base packages and config files. This often means that more RAM is used than a normal installation where only a portion of these aforementioned factors are resident in RAM.
It is for this reason that when you try flash a big image you simply can't as it won't fit into RAM for the flashing process. Therefore you need to start with a smaller image, flash it and then boot into it and flash the next image you want.
It's been very fun and I am enjoying the journey thus far with OpenWRT.
#openwrt
