For extremely small values of 'sometimes' where sometimes is constrained by the following expressions evaluating to 'true':

- you have no interest in maintaining your code

- your code will never be maintained by someone else

- you know your C preprocessor better than you know your C compiler

- your favorite language isn't available for this particular target

- you don't mind object level debugging

- your idea of a fun time is to spend a few hours per day memorizing code

- you really are smarter than everybody else

It depends how far down the rabbit hole you go.

Something like JCON (originally from mongodb, see https://blogs.gnome.org/chergert/2016/10/21/jcon/) is actually pretty nice IMO.