Afaik all pro audio standards more or less require ptp for timing, and that might add requirements for nics and switches? otoh the i210 nic, that is mentioned in the post, does have full (g)ptp/phc/tsn/etc support
If you want low and deterministic latency between different devices then you'll need ptp
ptp support in nics is becoming more widespread, nics not yet as far as I can see.