I've never experimented with the technique, but it would seem that the style is so antiquated that very few club fitters these days could even build a custom-fit putter remotely close to what the player would need. I'm assuming that at the very least a player wanting to try the technique would need to show up for a fitting, to get the length, loft and weighting correct to know whether it's something worth considering going forward.
Of course, I could be wrong. Maybe it's not that difficult. Perhaps some of the club fitters/builders here will chime in.
To my knowledge, K.J. Choi has been the most recent modern-day tour player who tried it, and eventually went back to conventional. And that was like several years or so ago. And he had access to the best club-fitting technology available, and still found it not as reliable as conventional style.