B/X dungeon crawls are also traditional in a sense, so some form of distinction from natural language is needed. Using the capital, or just Trad games to reference the Six Cultures breakdown, is sufficient. There's no Trad game that
@pemerton would preferably enjoy. Sandbox is a largely useless term, though, as it's used to depict Trad games with more open station schedules and the ability to switch tracks at stations, or it's a Classic hexcrawl with no Force at all, or it's a NeoTrad thing. It's kinda a super blurry term that people seem to value because it's seen positively as the antithesis of railroading. It's not, really, the antithesis. It can be used that way, but can also be used to run something pretty railroady.