A lot of cleaning products are different than their vintage counterparts. They quit making Brite floor wax for example because too many people were suing them for slip and fall injuries because their wax had Teflon in it (which is what made it so great and shined well). No other floor wax today has Teflon in it nor does it shine like Brite.
At least with vintage cleaners, you get to use the product(o long as it hasn't gone bad) and then you can collect or sell the can, so it's win-win. I used to have a glass bottle of Lysol I found at a yard sale for 5 cents never used, but I sold it in a yard sale because I got nervous of accidentally breaking it having it around the house.