I'm 64. I've used Windex since the early 1960s. Original Windex with Ammonia D (for "distinguished") in the aerosol can was an outstanding product. Since then, Windex has been letting me down. I recently cleaned the inside of my car windshield and I had to do it three times to get what I thought was a "streak-free shine." It looked good UNTIL I drove into the sun. WOW! The windshield, according to my wife, looks even worse than before I "cleaned" it. Not only is it extremely streaky, it is covered with large hazy patches. I will have to try and clean it again.
I also cleaned some mirrors around the house. They look pretty good close up. But from across the room, they are all quite streaky.
I am sad that the fine product I grew up with has become just another average window cleaner. I will now try to find a new product that will do what I was hopeful your new "original formula" would do but did not. After more than 50 years, I bid you farewell.