“Reduce the water in the tank, and you have to flush twice.”
The bigger problem today is that most older homes have 4” cast iron main drain lines that were sized for the “high-flow” toilets of the day. Now with low flow toilets there is not enough water volume to create the needed flow velocity to move the “waste” out of your home, and the old cast iron is rusty and rough which only serves to catch waste paper and cause the drain to plug up.. New homes use 3” main drains to solve the problem, but they are more prone to plugging up simply by virtue of their smaller cross-section. That is “progress.”
Yes, does sound like progress.