Nitpicking here, 91.175(c)(3) does not mention the "rabbit" aka RAIL
or Sequenced Flashers as an acceptable visual reference. You can
descend to 100' using the *approach lights* as a reference...
91.175(c) was changed to make "the runway environment" explicit.
RAILs or SFs are not on the list.

I disagree, 91.175 (c)(3)(i) says "the approach light system" which certainly
includes the sequenced flashers - see the AIM 2-1-1 which states "Some systems
include sequenced flashing lights".

One important point that people often miss is that in addition to seeing the
lights, the pilot must have the required flight visibility in order to
continue the descent below DH. Since 100 feet above TDZE on glideslope is
only about 1000 feet from the threshold, if you can't see the runway well
before then, you probably don't have landing minimums, and are not authorized
to go below DH.