It seems that "medieval fantasy" no longer applies to D&D. It's more of a steampunk game, despite some of the art. Here's why:
- Default technology: the SRD offers PCs muskets, pistols, and airships.
- The Clarke rule: sufficiently advanced technology seems to be everywhere, given the number of classes and subclasses using magic.
- Species: the English word is post-middle ages, but Darwin made it pretty official in the 19th century.
- Cosmopolitan travel: it's not impossible to see a halfling and a dragonborn hanging out together, one of which could have arrived quickly, from distant lands, via Broom of Flying, Carpet of Flying, or the aforementioned airship. These travel modes rival, if not exceed, the speed of a locomotive engine.
- Industrial labor: cantrips, i.e. unlimited-use-spells, can do things like purify steel (acid splash), perform hard labor (mage hand), refrigerate (ray of frost), generate electricity (shocking grasp), and heat a boiler (fire bolt). In addition, rock gnomes can create, at will, "clockwork devices."
- Mass production: there's no mention of scarcity in the weapon, armor, or gear tables. (It does seem to apply loosely to magic items.)
- Apparatus of the Crab: enough said.
Agree? Disagree? Why
isn't D&D now a steampunk game by default?
D&D has never been "medieval fantasy", so it can scarcely "no longer apply", I would argue.
I mean, what setting is that true in? Forgotten Realms varies from stone-age to near-industrial, but the "main areas" are basically 1500s/1600s in tech except for guns (and even those are like 1300s/1400s). Dragonlance is... I don't know what to call that mish-mash but medieval it ain't - that's Anaslon. Taladas is solidly Dark Ages, pre-medieval (apart from Baltch). Greyhawk varies like the FR, but perhaps more so. It does average closer to medieval I guess. Mystara is all over the place, including up to having nuclear reactors! Dark Sun is basically iron age but with a lot of neolithic tech. Spelljammer is "Age of Sail" more or less, 1600s/1700s. Eberron is quasi-1910s or so (minus guns). Planescape is timeless but has a 1700s/1800s vibe.
I could go on. D&D has never really been "medieval fantasy".
Of your points, none of them are really true/relevant in any setting except the Eberron.
Also you
really underestimate how fast even pretty old locomotives are. A 2-person carpet of flying is 60ft/round. So 10ft/1 seconds.
My brother in Gond, that's 7mph. That's a moderate jog.
How slow do you think trains are? In the 1860s, say, on straight and level track, most trains hit 60mph, so nearly 10x as fast as a carpet of flying.
What about the one-person faster carpet you say? Okay, that' 80ft/round. So about what 9-10mph. Most people could out-sprint that without problems. Aladdin it ain't.
So no, they neither rival nor even come close to rivalling a locomotive. Even in the 1830s the average speed of a locomotive was 12-20mph, so they'd not even rival that unless we double their speed, and those were often capable of 40mph or even more in the right conditions.