Status of keyword spotting and speech-to-text services

Hi openHAB community.
I would like to know about the state of this services.
I have seen that the interfaces for them (KSService and STTService) are there and seems to be a dialog processor that is invoqued from the VoiceManager startDialog method openhab-core/VoiceManagerImpl.java at cabb3f73150d13f44d647f46af8362e396684b92 · openhab/openhab-core · GitHub.
So is it ok to try to implement some bindings for this services? Or is the core really not ready for consuming them?
Thanks in advance for all the info you can share around this topic.