Is it accurate to assume that the 12-speed cassette compatibility is universal across all electronic groupsets, or do the nuances of the respective systems preclude seamless integration with cassettes from competing manufacturers? Specifically, can a Shimano GRX Di2 groupset be paired with a SRAM XPLR 12-speed cassette without any issues, or would the differing tooth profiles and bearing designs preclude optimal performance? Conversely, are there any 12-speed cassettes that are designed to be platform-agnostic, allowing for effortless integration with multiple electronic groupset systems?