You mentioned GoldenSound. If you go through his videos he experimented with clocking a DAC and the benefit was zero. Clocking other components before their signal gets to the DAC ensures a pristine signal for the DAC to process.
Denafrips and DCS use twin WORD Clock connections at 44 and 48 kHz. These are basically nonsense when a 10 MHz master clock is far superior and can be bought for comparative pennies. I believe companies that use WORD clock just want to tie you into their process.