I built robustreg in 2006 and at the time the major stat packages did not have a robust regression available. Below are graphs of weekly and cumulative downloads from just the RStudio mirror. I would estimate total downloads at over 150,000.
The median_rcpp() function is written in C++ and is multiple times faster than the R base function median().
> r_norm<- rnorm(1000000) > system.time(median(r_norm)) user system elapsed 0.040 0.004 0.044 > system.time(median_rcpp(r_norm)) user system elapsed 0.011 0.000 0.011 > median(r_norm)  -0.001214243 > median_rcpp(r_norm)  -0.001214243