Sometimes we get "why can't I see my {LAN,Ethernet,Wi-Fi}?" questions on ask.wireshark.com.
Would an menu item and command-line option to get "diagnostic information", which would include:
version information;
a list of the interfaces found;
and possibly other information, such as the results of "ls -l /dev/bpf*" on systems using BPF, the results of an "ls -l" on dumpcap, etc..
That information would either be written to a file or copied to the window system's clipboard, to minimize the number of steps a user needs to take when filing a bug or answering a request for information in a question.