Both reasons you mentioned are proof that people should not use and trust any form of Shamir's Secret Sharing.
Lack is clear standards and confusion between different implementations are big disadvantages, and this was never widely accepted by bitcoin community.
Sure it can be better in some cases than holding simple paper with seed words, but this could be mitigated with one or more passphrases.
Adding extra complexity with obscure incompatible system is no go for me.