People are still doing this and although results may vary significantly from person to person, there is actually utility to it. One friend of mine was saved from electric shock during his work on multiple occasions, thanks to his extra sense. Bioproofed neodymium implants can even be sourced from shady Chinese vendors at a very low price, indicating a certain level of demand. The only hurdle is finding someone willing to operate on you; some tattoo shop backroom is often a solution...

I don't think that present resolution would be good enough for me ;) - I wish an option with small matrix of tiniest, more sensitive magnets, maybe of varying (resonance) sizes ?

As a touch sense extension it seems intuitive to adapt - but feeling it more like a sound or colors, less as vibration then.. ?

What about inducted solution - like a matrix of nanocoils calibrated to/messing with nearby neurons electrical levels to provide super precise feedback - or to feel it maybe like different keys being focused to press by mm movements ? ( reverse keyboard ?? )