Agree entirely. I bought and played all of the above as new releases. They were just good Soulful Dance records to me... at the time of release, but felt they needed more of an airing at the 'Big Nighters' of the day (Clifton Hall - Cleethorpes - Bradford etc.) some 6-8 years after release. Thankfully they went on to be as big (or bigger) than many of the 'new' discoveries which were played alongside them.
Fact is, none of the above were well known in the mainstream until that time. And you're so right that certain records played on the Modern / Tent (type) scene will eventually find acceptance in the Northern 'Main Hall'.
It's always perturbed me though that so many just don't get it (or don't want to get it) until years later.
Just part of the mindset, I guess, but, thankfully, you can't stop the evolution of the masses.
Sean