We are at the last days. The Restrainer is about to be taken out of the way and the devil's own twisted adam servant of evil is about to be revealed. Joel's prophecy was fulfilled on the Day of Pentecost. If you are insisting that the language barriers and prediction not be attributable in this day to the technology GOD has allowed men to discover, then you and I have little else to discuss.
Take away technology, THEN the things seen on the Day of Pentecost will come as direct revelation to the minds of those who are faithing in His Promises ... and the conduits will be male, Jewish virgins chosen by God for during the Tribulation.
The barley can be harvested by merely shaking the dried stalks in a breeze and sifting the settling granules from the chaff. The wheat harvest requires a tribulum to press the grain from the stalks. The gentle sifting wind of the Spirit and the still small voice calling to repentance and trust in JESUS as Savior, in order to be born from above, are at an end. The tribulum of unrestrained evil is about to rule the next seven years. And God will then pour out HIS wrath on the ones who still refuse to believe in Whom GOD has sent for our salvation.
Yes, Joel’s prophecy, as Peter reported, was fulfilled that day at Pentecost when the Holy Spirit lit like fire in the room and the Gifts that “the prophets longed to see but did not live to see them” of this Messianic Age were made manifest.
Not sure what modern technology has to do with it, except that of course Daniel and John saw things at the time of the End that they could not explain.