I started my career in one of the most profitable teams within Big 4 accounting because they leveraged software when the other firms were focused on spreadsheet

I started my career in one of the most profitable teams within Big 4 accounting because they leveraged software when the other firms were focused on spreadsheets. Our team had > 90% market share of accounting business with our sector of public companies for this reason alone. Most of our clients had millions of transactions and assets, and, while another firm had an excel model for this, there was no understanding of the model outputs because it was a black box of incremental computations. While I was there we landed one of the 20 or so remaining public co clients simply because we could show them every step math along the way - we had accountants and engineers that understood the logic in and out. That said, most businesses can run on spreadsheets.