Lots of people view recordings without ever commenting on them: that doesn't prove lack of interest. It was on his 1977 album, The Noah's Ark Trap: maybe not yet on CD, even if Amazon is saying they have it but are out of stock!!
And I think it has been said that many subsequent recordings of the same song owe a lot, stylistically, to Nic's version.
The recent TV programme about Nic and his return to performing have certainly generated a lot of interest. I have seen him twice at Sidmouth Folk Week, when he played to a packed out concert each time. The emotion was palpable.
As I said, give it time!