PDFxchange is hands down the best PDF UI I’ve used. I switched from Acrobat a year ago expecting to be disappointed, but haven’t had any issues. The ability to customize almost everything about the software was what sold me and I’ll never be able to go back to the horrible experience of Acrobat.
A slap on the wrist for two of the tech giants is great progress. I would consider this a start, but not done yet.
The linked article supports this as well: