Worth learning Python or R?

Hi

I am relatively new to Data Analysis and Power BI.

My organisation only uses Power BI and Excel for any data analysis. This will not change in the near future.

I am willing to put in the effort to learn Python, R or both over time.

My question; Is it really worth my effort and time?

Guys in a Cube posted a video "Intro To Python In Power BI ". Some of the responses within the comments relate to Python and R being really slow and not having two way interaction with any standard visuals.

Below is a typical response in the comments...

"Python visuals are very slow once the report is published, to slow to be actually used in a report."

Thanks in advance