I say this as someone who worked on another Eclipse SWT application that I think is very good, is still in use, and that I am very proud to have worked on, but the SWT UI is the one thing I absolutely hate about Ghidra. I feel like many aspects of that specific school of 00's enterprise-Java-application UX design aged about as well as a wheel of goat cheese left on the dash of a car on a 90-degree summer day. (In particular, when using SWT applications, I find the buttons and layout to be cluttered and hard-to-parse - for me, the bars of small, densely packed buttons are frustrating to work with. Also, something about the iconography in those programs is generally opaque and ends up making me feel kind of stupid.)
Doesn't this just prove that Ghidra is actually very, very old? By the UX alone, I'd place it in the 2003-2006 range, the time when the excitement of Mac OS X turned into a new generation of bombastic widget toolkits.