The WM100 isn't dead however like any newborn it's growth depends on how much it is feed. Sadly Authinix doesn't have control of that nor does it appear they will have any time soon.
I wouldn't ditch the WM100 as much as just put it aside until it starts to grow again. The WM100 will never have RF so going the PI route will get you what you want in the fastest time possible.
the software on the PiX10Hub has had over 30 upgrades since first being created and the developers are currently busy working on adding more options.
True the software is nothing new and has been arround for some time but these are growing.
Perhaps when the WM100 app developer realizes they too are risking going hungry some movement will happen.
Truth be told the WM100 was/is a proof of concept much like my Pi embedded CM15A the only difference is the WM100 has stalled. Even if the WM100 software was to regain development it needs a hardware upgrade for RF to provide the advantages that provides.
As well the CM15A needs an upgrade to provide the PLC punch of the WM100. I'm confident both will receive these but which one gets it first will most likely depend on demand