Hi Richard, thanks for your input. Would you be able to elaborate on why security is not one of Tableau's strong points?
As for the 3rd factor - you are exactly right. The team has has specifically called out security and costs as primary hurdles. However, I suspect that lack of familiarity is probably an even bigger hurdle. They just haven't haven't verbalized that barrier clearly.
With that point in mind, I had posted another question on this community (here: Talking to "traditional" IT managers about Shiny). If you have any other resources that I can utilize, please let me know!