For typical datasets (~95% of companies have medium data on the order of gigabyte), you are 100% correct that the data modeling / formatting is the biggest chal

For typical datasets (~95% of companies have medium data on the order of gigabyte), you are 100% correct that the data modeling / formatting is the biggest challenge. Having well modeled data that matches the business domain is a massive (2-10x) productivity boost for most business analysis.