An FM radio receiver IC RDA5807M has a VCO local oscillator operating on the order of 100 MHz (implied by "low IF" in the datasheet), yet it can get its reference from a 32768 Hz watch crystal. Because of very high PLL multiplication ratio, there ought to be huge phase noise at the output of the VCO (70 dB increase over reference signal).
How did the chip designers get away with it? Phase noise degrades selectivity. FM stations are packed quite tight, not to mention issues whenever tuned station is weak and adjacent interferer is much stronger (actually a realistic situation).