Hmm besides the 8 Gb being there mostly for market segmentation... Does this mean the Neo/Air aren't useful for lightweight gaming at all? Lightweight as in indie-ish games, not as in session length.
8 GB (not bits) should be fine for light games. Was on the M1 mini at least. But that thermal cliff might come up surprisingly quick with modern graphics on even something that looks simple on the surface.
Anecdata: the first x-com reboot was nicer on my laptop battery at the time than random indies at the same time. Also it definitely had way more poligons.