New SA double-shot plates now cost $50 to have cut. And that's per keycap mold that it applies to. So if you need a new legend to be available in row 2 for one language, but row 4 for some other language, then you get to pay that $50 twice. Funding lots of new double-shot legends for fully sculpted SA keycaps is simply not economically feasible in most cases. 7bit manages it because his GBs are so huge he can spread the cost of new legends over enough kits that nobody notices the cost increase for subsidizing them. That would be a lot harder to pull off when you only have a few kits in your set to absorb those costs.
I'm not sure how I feel about seeing international users standing with their hats in hand asking for their special keycaps to be subsidized by the buyers of the dominant standard. For a lot of US buyers it isn't about how much or little it would add to their cost, but the principle of increasing the price of 95% of the base sets to accomodate the needs of 5% of the customer base. I'm just not sure how popular such a move would be.
Legends can be used across row profiles, but not cap sizes, so
a Row 2 legend can be used on a Row 4 cap, but only if the caps are the same sizes.
IMHO, it depends on the popularity of the sets, but if Massdrop (or PMK) could implement the "fallback" system I think that's the best for all. You could actually then even remove the duplicated caps from the base kit and have an ANSI kit, too. At least that one will be guaranteed to hit high order numbers. Nobody has to pay for caps they don't use, everyone gets the right caps for their language if their kit tips and if it doesn't they at least still get caps that will fit the physical layout of their board.
It's true that SP doesn't have a set MOQ, but for most kits the cost at levels below 25 is very high. You have to quote some kind of figure on the GB for each kit and people will simply not order if the quoted price is too high,, locking it to be a high cost, low orders kit, catch-22.
Even better could be something like Massdrop's "commit at this level" AND the fallback option for each kit. Then even kits that don't hit 25 will be made for those brave souls who've commited at low numbers, but they'll cost them a lot. If it doesn't hit your commit level, you get the cheaper fallback kit.
@suicidal_orange: I like the concept behind your idea, but it has three flaws:
1. logistics nightmare - I would not like to be the one to sort all the individual cap kits to orders. Bound to go wrong and and have at least a few incorrect caps / missing caps sent out.
2. PMK limit of 10 kits, but this only affects the GB if you run it through PMK.
3. Assuming one or two of your caps doesn't hit MOQ... A separate blanks GB afterwards is a hassle to arrange and will need a new production slot (which may even create a subtle change in the colour). And I for one don't want an almost complete Finnish kit with blanks. I'd rather have a fully complete UK kit.
TLDR: GB systems need to be upgraded to include "commit at this level" with "fallback" option per kit.