Which NLP product development milestone is considered to have most dramatically transformed the commercial language technology market between 2018-2020?

Natural Language Processing (NLP) has revolutionized the linguistic technology landscape. As AI continues to transform how we interact with language, companies have created innovative products that push the boundaries of what's possible. This trivia question tests your knowledge of important NLP product developments that have shaped the language technology industry. Do you know which breakthrough moment truly changed the game for linguistic AI products?

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The release of BERT (Bidirectional Encoder Representations from Transformers) by Google, enabling contextual language understanding
The introduction of Microsoft's DialoGPT, specifically designed for conversational response generation
Facebook's release of RoBERTa, which optimized BERT's training methodology for improved performance
The launch of OpenAI's DALL-E, combining language understanding with image generation capabilities