It seems kind of strange that enthusiast boards have DIP switches to switch from QWERTY to DVORAK to COLEMAK, but leave out the printed keys? Or don't come with DSA caps?
I can see some reasons for having hardware Dvorak options.
1. You are using a shared PC regularly, want to plug your own keyboard in and work immediately without messing with the OS settings.
2. You are using old / weird hardware that doesn't have a Dvorak keyboard layout option.
3. You are doing stuff pre-OS bootup and can't remember where Qwerty is.
Other than that, I can't really see real benefits of owning a keyboard with hardware swapping. Just one more thing to go wrong.
Plus one downside. For games that have Dvorak support the hardware option may be worse, as they won't realise you want to use ,AOE for arrow keys. Although most Dvorak players get used to manually adjusting the inputs anyway I guess.
I used a WASD Dvorak set for a little while, but they felt very basic to me, worse than generic OEM caps (I went to blanks rather than use them). Then I used DSA Dolch for a year, which was a strong upgrade. But now I have swapped to SA Retro with Dvorak kit and for me there is no comparison. A nice quality sculpted Dvorak layout is pretty great, I wouldn't want to be without it now. Tracking down a sculpted set you like may take a while though, as not all end up made. Troubled Minds, for example, looks like they won't tip their D/C set.
Good luck with it. Whatever happens you are likely to spend more when that perfect dvorak keyset shows up for you
