I think that Gus was trying to highlight the potential issues of using waterbased finishes, of which swelling is my biggest complaint, along with inferior durability and flow.
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I tend to recommend off-white oilbased finishes, yellowing will be less obvious. Just my own personal preference.
Thank you for trying to clarify what he was talking about.
Another option (for skirtingboards, etc) is estate eggshell - the F & B one is very tough once cured and being water based, doesn't yellow...it has just a little less of a sheen than satinwood and obv. less than gloss. I quite like it though and it goes on better than some w/b satins.