Silicon Carbide JFETs and Ham Radio ?

I got an email this morning mentioning SiC (Silicon Carbide) JFETs from onsemi.  These SiC JFETs are a family of parts among the WBG (Wide Band Gap) semiconductors.  There are now tales of super USB chargers that are really fast and small - chances are they use some kind of WBG semiconductor to handle the high voltage / high current of stepping down rectified AC line voltage to 5 volts DC with high efficiency.

At first I thought these were something new from onsemi but as this DigiKey listing shows:

onsemi has bought the JFET portfolio from another company (United SiC ?) but still, it's something new to me.

Here are the onsemi (formerly Motorola) offerings:

https://www.onsemi.com/products/discrete-power-modules/silicon-carbide-sic/silicon-carbide-sic-jfets 

An Intro to SiC JFETs:

https://www.onsemi.com/download/user-s-manual/pdf/um70113-d.pdf 

app notes for SiC JFETs:

https://www.onsemi.com/design/technical-documentation#ZHQ9QXBwbGljYXRpb24gTm90ZXM7cHQ9MTAzMTcyOw== 

the  cascode TO-220 device shown in the screenshot above:

https://www.digikey.com/en/products/detail/onsemi/UF3C065030T3S/11587026 

The price is really high, I suppose that something like this part might be slipped into the Keyall HV but I don't think it would offer the user much in this application.

The first thing I thought of for Ham Radio was: 

 depletion mode power JFETs with high voltage capability => might they have application for tube substitutes ?

But then the prices and technical complexity step in - I don't think it's that simple.  Our fellow travelers in hobby electronics, the tube audiophiles, seem to have dabbled with these transistors but I'm not getting the sense that SiC JFETs are sweeping the audio amp building community by storm.

It's never that simple :)

Best Regards,
Chuck, WB9KZY
http://wb9kzy.com/ham.htm