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UDP is for video streams and other applications where a couple of dropped packets do not matter. Triple handshakes are kinda pointless for these types of data transfers.
Every packet is born equal. It is heresy how some people believe that some little packets, born with a certain task, are worth so little that we can just "drop" them. Imagine poor little Bobby packet #93736, on his school field trip, carrying a pixel of your stupid Microsoft teams meeting... but he gets lost in the crowd and left behind by the rest of the class.
Bobby Packet will never see his family again.
"Too much overhead", they said. "It's okay if we lose a few". Billions of little packets are lost daily, forever, all because UDPcels believe in file packet supremacy, and that Bobby Packet "didn't matter".
TCP is proof of a loving God. In a TCP world, the teacher would do a head count... and figure out that Bobby Tables had gone missing. He would shout RETRANSMISSION! He would search ceaselessly just to find Bobby Packet again. And he will.