From experience, the global Oil & Gas industry is completely reliant on Excel, and that will not change any time soon. They use it for nearly everything... It's the common UI to bigger, complex systems, and it's the data storage/manipulation tool for more specialized, or "simpler" needs.
Many of the non-Excel applications in this space started out and grew from a monster Excel workbook.
From experience, the global Oil & Gas industry is completely reliant on Excel, and that will not change any time soon. They use it for nearly everything... It's the common UI to bigger, complex systems, and it's the data storage/manipulation tool for more specialized, or "simpler" needs.
Many of the non-Excel applications in this space started out and grew from a monster Excel workbook.