I would warmly and strongly recommend to add this feature as soon as possible. I have to give the use of the database to users who don’t know how to deal with the API and are not expected to. They might need to set the same field values on multiple, not necessarily-contiguous records.
If they cannot do that makes me start thinking that we will be better off with Airtable. Which is a shame because I personally like all the other features of Baserow.