Can anyone think of a phrase we would use to describe a situation where something is the opposite of "out of date"; that is, it's "too new"?
For example, a banana that's been sitting around for ages and is inedible could be described as "out of date", but a green banana that's not yet ripe is at the opposite end of the spectrum. Another example might be an engine part that is too old for a particular model of car; it would be "out of date". But what about if the car is old enough that the part's design has been updated since the car's manufacture, and the replacement part would now be "too new" to operate with the car's engine?
Obviously one way to deal with this latter situation is to turn the sentence round and descibe the car as "out of date", but is there a succinct way to keep the "too new" object as the subject of the sentence and describe it as the opposite of "out of date"?