As well-intentioned as some in the crypto space are, it's telling that not one implementation besides the big 2 (which are used for speculation rather than transactions) has managed to pick up a following in terms of actual usage.

As fragmented as open source efforts usually are, there's usually some network effect that lowers the risk for someone else to try it. Linux, LibreOffice, Lightttpd etc. With crypto it's winner-take-all.