I wanted to try something new to me....topped with pure tung.
https://photos.app.goo.gl/TeNP6S4m6SQdT80h1
https://photos.app.goo.gl/TeNP6S4m6SQdT80h1
I'd never given this any thought (nor was ever tempted to buy) but you're right that it would disguise heartwood colours, blemishes and small knots.It's attractive and probably fine for a hatchet but I am not a fan of fire hardening wood. It weakens it too much. It was a trick used by handle makers to make their lowest grade hickory handles look snazzy and hopefully sell.
On another website I see guys charring the hell out of perfectly good hickory. They just don't realize the damage they're doing.
The 'flavour of the month' fashion component of private industry knows no bounds. Which can somewhat be likened to liberated ladies cheerfully forking over $100 more to have the knees of their brand-spanking new jeans already holed.Not sure how much damage they are doing by scorching the outside fibers. Its for sure not helping though. Interestingly Link handles are charging for that that flame hardened finish as that is the most expensive handle in their line.