TO backstory or not to backstory, that is the question:

Whether ‘tis nobler in the mind to assume the reader

will figure the character out through bits and pieces

Or to suffer the slings and arrows of outrageous critique asking

“Why, why did you bore me so?”

To rush to fix a sea of troubles with a “kill your darlings” red pencil

Or perhaps a section break.

(Sorry, Bill. Frustrated with a rewrite that cut too much.)