Re: Metric? Keep or change?
 

I vaguely recall "The US will be metric by 2000" or something like that. Go metric it's what the classic system used.

Re: Metric? Keep or change?
 

(Weights and map distances were also in metric.)

One approach could be to try to push as many measures as possible to generic game-units (hex, megahex, maybe even generic encumbrance units) and then list in one central early place what those are in real-world units, both metric and Imperial.

If not, my personal tendency would be to stick with metric, though it might make sense to take a broad poll of gamer opinions.

Then there's the consideration that a 1.33m hex would be 4 feet 4 inches across, each megahex 13 feet, or you might tweak it. 5-foot hexes and 15-foot megahexes? If you used 1 hex = 1 yard it and the counters/maps/scenarios/etc would be nicely GURPS-compatible, but then bodies should be 2 hexes, horses 3, polearm reach 3, etc... (On the other hand, when I moved my TFT campaign to GURPS, the scale change seemed to have little problematic effect except not being able to use the horse counters for adult horses.)

Re: Metric? Keep or change?
 

Frankly, it's not that big a deal; however if I were forced to vote, I'd go for yards, pounds, etc., simply because it's a fantasy game and not a Sci-Fi game.

Re: Metric? Keep or change?
 

Ditch it. The vast majority of your players are unfamiliar with the metric system and as you said, the decision was cutting edge for the time. I think the bottom fell out of the metric system when the NFL found out its stadiums wouldn’t accommodate converting yards to meters, but I digress. There’s no advantage at all for most players in using the metric system.

Re: Metric? Keep or change?
 

That's almost certainly untrue; we may not be a metric country, but that doesn't mean most people aren't still taught the metric system or have learned it for other reasons (such as other RPGs, including the previous edition, that used metric), and of course international players will be unfamiliar with US customary units.

Re: Metric? Keep or change?
 

Most Americans do not think or play in metric regardless of what was officially taught in schools.

Re: Metric? Keep or change?
 

Even tough I am used to the metric measuremenbts and weights, I find it logically to use it for modern and sf campaigns.

But for fantasy, I like to use archaic measurements (passes, day's-marches, etc.). Exact measurement is nice info for the GM (absolutely not for PC's if they don't have range finders or spells which tells them exactly how far, how heavy it is) but it lacks the fantasy mediaeval feeling.

Re: Metric? Keep or change?
 

Most Americans are familiar enough with metric that one meter hexes will not confuse them (it's sorta similar to a yard, right?), and unfamiliar enough with the actual weight of armor and weapons that it doesn't really matter if kilograms are confusing.

Re: Metric? Keep or change?
 

I vote keep. Cidri has a science fictional vibe. Plus I've been playing Fantasy Hero in metric for years.

Approximations are good enough. One meter approximately equals one yard. One kilogram approximately equals two pounds. One liter approximately equals one quart.

Re: Metric? Keep or change?
 

I see no compelling reason to change the game from the metric system, personally I think the American system is obsolete and should have been replaced in the 70's anyway.