"The New Basics" never made it quite to the very center of my rotation the way the original SP book did. I consult it frequently, often use it for a jumping off point, or a reference, more than doing a specific recipe.
The original is very 80s, but in a good way, I think. Overall that book seems to me a triumph of distilling the most useful information and organizing it in the most usable way---all the right things are in the right places, whether an appendix or a table or chart, or sidebar. The overall tone is so friendly and encouraging, I think it's an absolutely timeless book.
"Strange how potent cheap music is."