In reply to Drexciyan:
People have been making forum posts like that for 20 years plus and yet some more recent seasons, 2013, 2015, 2018, 2021 for instance, have been excellent with pretty much every route being in condition at some point over the last 10 years, so I'd say there's every point in such books being written.
With Scottish winter climbing being much more based around seasonal variability in weather than Alpine summer conditions, which are more affected by longer term changes to glaciers and permafrost, I think Scottish winter climbing is a much more viable activity than summer alpinism.