Excel is a tool. It empowers those who don't know how to code to do their jobs more effectively than before without "learning to code". It's something you keep in your garage in case you need it. It depends on what their current workflow is. Sometimes I'll use Excel, sometimes I'll use R/Python.

What's important is that Excel gives you access to the computing power of modern technology with a lower barrier-of-entry/knowledge. That's one of the most valuable things that many people fail to understand. Not everyone is a programmer and for a lack of a better term, "doesn't really care about UTF-8 and just want the calculations to work". Also, in many cases Enterprise IT in critical infrastructures are resistant to supporting R or Python due to their security models (firewall rules prevents install.packages('tidyverse') for example).

This is what makes us specialists and someone they bring on board to help them out and explain to them about what the "best-use-case" is, and then watch as people try to cram a square peg into a round hole.