Actually large companies are mostly manual compared to most small/medium size companies. Just too many processes to just generate correct journal entries in SAP from purchase, sales, operations, production and distribution. Moreover adjustments, inventory counting methods, purchase, sales require creative use of manual processes, excel and laborious job of account reconciliation at closing (which indeed is just a snapshot report at point in time). I have yet to see a multi-national SAP installation which automatically ingest banks, financial institutes reports and generate account reconciliation entries, government reports automatically.

I feel combined with machine learning and storing hledger records in some large databse, it can become a powerful automated accounting system which SAP and large vendors can just dream of.