If you want to start using Tableau at your company, you don't need huge IT resources or start a big BI deployment. Just purchase the software, install, and you're ready to go. Maybe you don't need ANY IT help at all.
Events can be distributed to chart elements which respond to user actions. Event listeners are simple JavaScript functions which are very easy to use and understand.
Plugins for AngularJS, Ember.js, jQuery, Meteor, Node.js, React: http://www.anychart.com/plugins
Technical integration templates and samples for all popular programming languages, frameworks and libraries, and databases: http://www.anychart.com/integrations/
Supports almost all chart types one could ever want. From the most common bar charts, area charts, and donut charts, to funnel charts, polar charts or Japanese Candlestick charts.
Business requirements change over time. Looker UI essentially assumes that any view you add will never have any new columns or measures, an impossibility in any business