I've seen round stainless steel rod epoxied in half round grooves before for frets, so yeah, it should work.

Just an idea if you didn't want the problems associated with metal moving different then the wood.

Nice guess but nope.

One issue ... is the wear characteristic. Nickel steel frets found on modern instruments turn copper and gut strings into tattered remnants very soon. On the terz guitars I made I went to great lengths to have brass frets. I got some brass rods from the hobby store, about 2 or 3 mm in diameter, had a jeweler put them through a band press (which every jeweler has) to fit into a pre-cut slot, made with a hand saw which I use only for that purpose, specially sharpened and set. Then the frets are leveled, rounded and polished. They stand up from the fingerboard only 1 mm! The lowness of the fretting and the low action (Panormo and Terz) make the guitar ultra-responsive and more like the lute or tied frets on a period guitar, which have frets about .8 or .7 mm high. This changes the whole character. The wear problem is much reduced since brass is quite soft. I have my Panormo fretted in ivory, probably the best material, salvaged from pianos. With all these things in place you will have a new experience of fretting. More articulate. Less work to do. Better vibrato. Less string wear and intonation problems. But, less tension and softer."

Why? Because!

Let's just say i had an ineresting idea and iI am not aware that anyone has tried it. Matter of fact, i should have googled it before now... I'm going to do that right now and see.... Nope... nada!

The only thing i haven't heard here yet is whether they would be a pain to replace, if epoxy breaks easily enough or would one tend to ruin the fretboard trying to get them off..

"If it is that you couldn't find any reference to using Ivory for frets or if you couldn't find anything about gluing frets on but both have been done. So you didn't invent a new way of fretting an instrument."

Neither.

Not interested in ivory frets and knew that frets had been glued on, just wasn't sure how well they might hold on. The only thing i haven't heard here yet is whether they would be a pain to replace, if epoxy breaks easily enough or would one tend to ruin the fretboard trying to get them off..

Positioning them and holding them in place until they cured might be a bit testy.

Epoxy squeeze-out clean up might be messy?

There might be some issue with fret replacement... tear-out of the fretboard?

Without really knowing anything about epoxy, they should be fairly permanent and it would "Work"?

My guess is that you want the frets to go in a wiggly line across the fret board in an attempt to compensate each string differently.