Upload & Sell: On
Because SW doesn't mix less than a quart.
And yes, the paint industry in the US has been shifting to safer, water based products for over a decade. Many old, trusted formulations are no longer available. In most cases, but not all, replacement products are comparable in appearance and performance. Consumers who purchased products made with volatile and/or toxic materials will in some cases notice the difference. "Matching" paint is often a misnomer, as raw materials and finish processes change. More often the best one can hope for is "compatible" or "close". The world is changing.
As someone who has done more painting professionally than I like to remember (as a restorer of historic buildings), "matching" has always been a crap shoot. Yes, the removal of lead and now the movement to non-petroleum bases makes it harder, but there really is (and never has been) no such a thing as an absolute match. Time, environmental stress, material painted, and so on alter finishes (of all types). Try matching antique furniture finishes if you really want to go crazy.
That said it is all a question of "close enough." That decision is in the eye of the beholder. Has anyone used any of the products mentioned in this thread? If so, how did it turn out?
(All my whites are old and show it!)