Sorry - no updates on Yellow compatibility with a serial-header based Z-Wave controller from me as frankly, I think they are a silly idea!
USB devices are more common, more compatible, and can be updated on any device if the manufacturer decides to go stupid-locked-in-to-windows for updates.
As long as you avoid a coordinator on a blue USB-3 port (search for the RF interference video), all is good.
Nabu Casa have all but stated their renamed "SkyConnect" Zigbee product is going to be joined by a Z-Wave coordinator, but there’s no dates.
Personally, if my modified Aeotec S5 died tomorrow, I’d still buy an Z-Wave Plus Aeotec Z-Stick 7 - even after they messed up the S5 USB interface, released the S5+, and ignored customers without a soldering iron.