Help - Business moving away from Tableau and I need write a GOOD justification to keep it!

I have been using Tableau since Tableau 7 in 2012. Our team used to attend the conferences every year. We are moving away from Tableau and using PowerBI for dashboarding. We are a fortune 100 company.

I don't build dashboards, I use tableau prep and the capabilities to pull in large amounts of data and join them together for analysis. I make a lot of crosstabs, impact calcs, and trend views to find outliers and investigate data. I am 'jedi' level and can LOD with the best of them.

I have used Power-bi in the past and have found it much more cumbersome to do analytics. While powerbi is great for static dashboards, it feels cumbersome for what I do.

What kind of justification can I make? I don't require a Tableau server, just a stand-alone license.