Calculated Links to Parents
Classic introduced the idea that a record could be linked via computed value (when first created). Linking a child record to the host of parents that are often logically connected is prone to error, but more importantly is something my users aren't willing to do.
For example, if I link a Support ticket to a Contact, it makes sense that the Ticket would link, in turn, to that Contact's parent Account - without the user having to enter the information. You were almost there on this feature in Classic - why is it absent here?
Joe Tareen commented
Has this feature been introduced yet...I am looking for a similar ability
The infrastructure on which this system was built is completely different than older versions. When creating relationships or calculations, the values are not actually stored in a table. These types of fields run the underlying queries each time a view or a table is loaded, which outputs a value to the user interface with real-time results.
That being said, our engineering team has been exploring ways in which to automate the process of linking child records to parent records, so we can keep you updated as more progress is made in that direction. In the meantime, please let us know if you have further questions.