I got engaged in a 'R versus python' debate recently. One argument for python was that it is more popular, observed on Stack Overflow tags count (you can run the query here). It show both tags count rapidly growing, with python way above in term of total volume. I rapidly answered with the same graph but for the Stats stack exchange (here), which also shows both tags count growing but with R far ahead.
However when the debate got to a more specific field, i.e. quantitative finance, we found a very different graph (here) : since end 2016 the r tag seems to have disappeared completely. Upon further investigation it appears to have been merged with the programming tag, along with 10 other programming languages. But, python is a separate tag.
It seems strange to me to treat those languages differently, like someone tried to forcibly remove r as a tool from the quantitative finance field. Can someone explain what is going on?