
“The chart below (from the olapreport site) shows the dynamics of OLAP market shares in the last 7 years. Microsoft has crossed the magic 30% line, that nobody was able to cross before. Of course, the market share in this chart is measured in revenue for the vendors. Had it been measured in number of copied sold (or installed, or instances deployed), Microsoft probably would be somewhere around 95%, but, alas, Nigel refuses to even measure this metric, insisting that the real market share should be measured in how much money the company made.”
See Microsoft OLAP by Mosha Pasumansky for more.