The Gartner report was released a few months ago. I was looking for an objective review of their quadrant and who was gaining ground and who was losing ground. I found this excellent summary with insightful commentary. Link
Gainers: Tableau, Qlik and Spotfire. Losers: Microsoft, MicroStrategy, SAP and Oracle.
We don’t need more tools right now but we do need to keep an eye on the future for when we might want to retire a tool or move more solutions to a tool we already have.
Hope you find the analysis informative