The problem with Pampers is that they keep upping the size numbers without actually increasing the size of the diapers. In fact, the diapers have gotten smaller. In 2011, when I first started measuring, Baby Dry 6 was 22 inches long. Cruisers 7 was also 22 inches long. Today's Swaddlers 8? 21.5 inches long. And the tabs don't stretch much anymore.
Maybe, but I suspect it was to force parents to keep sizing up. Swaddlers N and Swaddlers 8 differ by about 9 inches of rise and 10 inches of waist. That means, as you go put a size, you're only adding about an inch to the intended rise and waist! It's absurdly fine-grained sizing, and if you want to sell all those sizes, you can't have them overlapping each other by much. The old tabs on Pampers probably meant that parents were very slow to move up a size, and those with multiple kids were probably trying to economize by finding a size that two or more of their kids could wear. Making the tabs less stretchy "fixes" that "problem."