Expert mode not easy to set.
Exceptions on startup are not easy to debug because exceptions are caught by
last_error and partially shown.
As far as I know to have the full traceback at startup I have to modify the Bliss code. Also we have the --tmux-debug option that works only in some cases.
I propose a single option like
--expert-mode that shows the full traceback of exceptions and includes
This would be more user-friendly.