Way back in v12 (RSO v1.5.6) there was compatibility for a mod called 'Straight World' which changed the map gen to have everything chunk aligned (Water/Land/Resources)
I've gotten back to Factorio after a few years hiatus and want to request that functionality to be added back in (if possible)

RSO still has the original code (config.lua/lib) etc however changing 'useStraightWorld' to 'true' doesn't actually initiate generation.

Request that 'Straight World' be added as an option similar to 'Donut' shapes.

Actually, I'm an idiot. It does still work, but there isn't a 'settings' option which means it has to be manually edited via config.lua.

Request it be added back to the Map Settings to allow for use between different saves

There is a chance that this setting predates Map Settings so it was not added there.
I might move it there if I work on mod at some point but editing of config.lua also works between saves.