From a larger perspective, I agree with this. Most quality guitars can be made to stay in tune pretty well if the nut and bridge are setup correctly. Having a stable neck helps, too. String construction makes a huge difference (hex core seems to hold tune much better than round core), and of course, playing style, as well.
For example, while I have a fairly light touch on my left hand, I've been known to beat the crap out of my guitars with my right hand. That's why Floyds work well for me when playing live, they can handle that. FWIW, I always bring at least one fixed bridge, too. Easy to change tunings, and I love those guitars, too.
There's nothing wrong with preferring one over the other, but both are valid choices. I very likely have more guitars with a fixed bridge than I do with a Floyd (or Kahler, or vintage Fender). I just like them both.
Yes, my former LPs needed a re-tune after a few songs. But nothing crazy. My Duvells? They hold tune perfectly. I played for 3 hours straight today and the thing is still in tune. I can leave the guitars for two weeks and pick them up and they're still in tune. I think it's from two things: the necks are super stable and nut/bridge are set up great. I can't speak for Setius or Regius models. I've only ever played Duvells.
I've wanted to try one of these for a while, but I'd have to buy to try. Guitars are so personal that I'd be afraid of not jiving with it..yours look amazing. Incredible wood grain on that one...wow.
One guitar that I had long ago as my drop tuned gig axe was a cheap Korean made Washburn X50 ProQ...hardtail with a baseball bat neck and had a Buzz Feiten tuning system. That was the most consistent in tune hardtail that I've owned. 300 bucks used. Lol