While they may have changed in many ways - as far as the UX for the average user, it's been a lever to press to make it flush. Now I still see new low flow ones

While they may have changed in many ways - as far as the UX for the average user, it's been a lever to press to make it flush. Now I still see new low flow ones that have levers, and some new ones have 2 buttons. Of course there are those that auto-sense arrive/leave in some commercial establishments... But to the average user they have no changed that much I think - most still have a lever, if you can't find it and you are looking in that general area you will see the two buttons and likely press one to see if it flushes.. and press it again if it doesn't flush enough.. just like the old ones :)