If I change a Helper layout, will it change where it's used?
No. Helpers are coupled with the page once placed. Changes to the Helper layout will not affect existing instances.
Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
No, you cannot layout forms with Acquia Cohesion.
You can style tables or forms through the use of base or custom styles.
Running the composer update command will update any composer packages that have newer versions available.
Yes, the generated templates can be saved to the database.
Yes, this is possible by creating a custom element.