Annoying frequent updates (and slightly less frequent crashes)
I have Acrobat Pro DC on my Windows 10 PC. I worked with a huge amount of PDF files at the same time, almost always reaching the maximum (50 open files in my case). Therefore it is very annoying to constantly get messages asking me to restart it due to some updates. If I ignore it, weird things start to happen, such as two icons with different appearances showing up on my task bar, or not being able to see some files from the task bar menu. If I restart, I have to reload all 50 files, and there is no easy way to keep track of them every time! The update happens at such a frequent rate and it is very annoying given the mode in which I operate. This makes Acrobat very user unfriendly.
Not to mention the crashing I experience from time to time. Each time I have to pick up the pieces by trying to remember which of the 50 files I had open before. The file history function is not a great help on this. Acrobat used to have a much better history management tool, but not any more. It makes me think the "PRO" should be removed from Acrobat PRO. It is not intended for heavy duty professional use, but for amateur dabbling of 3-4 PDF files. By the way my PC has 64 GB of memory, so the crashing is not due to memory overload. The memory usage is usually at the 30-40% level when this happens.