Currently it's possible to cancel out of the initial Gnucash account-creation dialog, manually create accounts, add dozens of transactions, and then close Gnucash without saving. There's no warning or prompt if you do this; all the work is just gone. (No save file appears in the default locations, and running the resulting .log file just makes Gnucash crash.)

I propose that Gnucash actually make it impossible to create new accounts, transactions, etc. without having a save file or database. If the user doesn't have one, he/she should be forced to create one before creating an account.