Enable textbox container animation natively

Here is an example of all we need to resize the textbox with sliders. It would be much better if there was the possibility to animate by simply modifying the pivots at each end of the text box, and in that way the text is accommodated inside the box. An excellent update for AE would be to have the option to animate the text box natively.
After Effects: Resize Textbox Hack with Expressions (youtube.com)