What Are The Disadvantages Of Alteryx Designer?

List of disadvantages of Alteryx goes as  follows:

• Some statistical R packages are difficult to understand as the packages are not straightforward and some learning is required.
• Alteryx can give the outputs of Tableau data extract but it is not capable of reading a similar extract. 
• Not favourable to use when multiple users try to access the same workflow on a server as it becomes unstable and frequently crashes. 
• It does not support special characters.