Analog Input Tags, Analog Status Tags, Digital Input, Digital Status, etc are all considered legacy type tags according to the VTScada Help files. It is advised to use I/O and Calculations Tag instead. Why ? Is there anything wrong with using legacy tags ? What are the main differences from legacy tags to i/o & calculation tags ?

The I/O and calc tag is the most modern and has the best functionality with the included widgets and also allows you to change the type of a tag without having to create a new one. This essentially allows you to move something like an analog to a discrete without losing the history of the tag.