It is nice because when available (Linux only?), it is a lot faster than
using a dedicated debugger such as GDB or LLDB, and also it allows to
always have a backtrace, even when no debuggers are installed.
Unfortunately the output is a lot less detailed, with no file paths, no
line numbers (even when debug symbols are there), no local values
printout, etc. It's pretty bare, with function names and the stack
levels. This is why it is not given priority, and GDB and LLDB are still
preferred when available.