Currently the LEDE device page https://lede-project.org/supported_devices
has a warning about that, and also the same warning is repeated in the "ideal for LEDE" https://lede-project.org/toh/views/toh_available_864 ToH.
The ToH on OpenWRT wiki isn't showing any such warning, https://wiki.openwrt.org/toh/start so I suspect most of the people complaining were looking at that table to see what is supported. @tmomas can you add clear warnings there too?
I think that for these devices (both 4 MiB flash and 32MiB RAM) it would make more sense to eventually drop the default firmware build and redirect users to a freifunk-like imagebuilder webgui so people can build their own firmwares with stuff they need integrated on-demand (using profiles or whatever to help them), as they will likely fail to install packages anyway.
(Yes I have a 32MiB device, and it works fine, only issue is that it can't install packages as opkg triggers OOM killer that goes on and sacrifices children, this is the actual message I get)