Bypass / Fail-Open NICs

Anyone have experience with any ByPass/Fail-Open copper NICs (for *nix or BSD-based). Seems like a very niche product, but I have a project in mind I’d like to try them with.

A few NICs from folks like LR-Link come up, but curious if anyone has experience or gotchas related to actually using them. A SFF SOC with the feature may also be interesting if anyone knows of any.