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Automotive radar technology is rapidly evolving to meet the demands of advanced driver assistance and autonomous systems, and Phase-Modulated Continuous Wave (PMCW) radar has emerged as a promising candidate. Motivated by the benefits of Multiple-Input Multiple-Output (MIMO) radar configurations, PMCW radar significantly enhances multi-target resolution and robustness against mutual interference. However, several challenges must be addressed to fully harness its potential in dynamic automotive environments. This keynote speech examines the critical issues of Doppler compensation and the high-speed Analog-to-Digital Converter (ADC) sampling requirements. I will discuss innovative techniques developed to mitigate the Doppler effect, ensuring accurate target velocity estimation despite rapid vehicular motion. Additionally, the talk will highlight our novel solutions to manage the stringent fast ADC sampling rate demands, which are crucial for capturing high-bandwidth signals without compromising system performance. Looking forward, the integration of few-bit ADCs in PMCW radar systems is being explored as a pathway to reduce hardware complexity and power consumption while maintaining robust performance. Together, these advancements promise to propel automotive radar technology into a new era of safety and efficiency in intelligent transportation systems.