Thermally modified wood solution?

It's not clear to me what problem they have solved - their decking still needs oil, and still turns grey without it.  So they've turned pine into ipe maybe?

Their musical instrument woods are simply resin filled from the sound of it.  K & G Finishing in AZ does much the same, except you pre-shape stuff and have them fill and cure rather than hacking your parts out of a slab of pre-treated wood (the resin is hell on blades).

I've never used it but my hardwood supplier has it on the same page of their catalog as tropical hardwoods. The description calls it "American hardwood"; I'm thinking poplar or birch. With tariffs, it will probably be too expensive to compete with treated SYP.

I have used thermally modified wood in several turnings. It is like turning molded dust. To me it is very weak, there is no way I would use it in any time of structure that requires strength or support from such material. It does turn almost black after a finish is applied

I am using thermally modified ash for a project now - bought as offcuts from a commercial shop that I believe used it in decking.  Because the wonderful color is consistent throughout, and I chose this for the color, I won't have to add dye or stain in my finishing.  
My experience so far is not like Sam's - what I have cuts & sands very much like 'normal' wood.  I also have a few pieces of TM poplar, but have only shuffled these pieces around the shop so far without cutting or sanding.

Henry