We can use TextBox with a data utility and the removal of the Single Value Constraint. However, if we try to use the SuggestTextBox, the removal of the Single Value constraint no longer works. R&D provided a way to get it to work with 5 values but putting a limit on the amount of values that can be added is a hard sell to the users. We immediatly ran into an issue where they wanted to add 6 values and this "fix" was no longer sufficient.
For more history see case: C12411276