I love the touchscreen and would be very disappointing if I had to go back. One of the additional benefits of the UI being setup for touch is that it also works with a mouse quite well. The targets are big to work with your fingers so your mousing precision can be terrible.
The tasks that I do with an oscilloscope are WAY faster than they were before the Keysight scope arrived. All the little details that do not come through in a review video are my favorite things now. When I am struggling to sort out a circuit, I want to focus on the circuit and not the scope. That is what the touch UI has delivered to me.
No, I don't have any obligation to say nice things about Keysight scopes.
As for memory - I am always hoping for more. In daily reality, I have learned how to use the segmented memory and the advanced triggers to get what I want inside the confines of the memory. It has not been a critical limitation for the work I have done so far. If you are not familiar with the advanced triggers and segmented memory, it will be more of a limitation if you are searching for occasional events. I use the color grading, persistence, zone trigger, and others to dig out the events that happen very occasionally and I don't have to scroll through a massive capture to do it.
At the end of the day, my favorite feature is that the scope is not the center of attention - my DUT is. The scope conceptually disappears and I just do the work. That is exactly how it should be.