Should we always put validation group

Question

Should we always put validation group even if the page has no more than one validation group or should we wait until there is a need to seperate validation group then we put the validation group.

Answer 1

No, there is no need to put a validation group if there isn't a need to separate them out.

Answer 2

No, Not necessarily. Like If you want to use ValidationSummary control for the validation controls then you have to use validation group.