James Gasik
We don't talk about Pun-Pun
I don't recall what the official stance is on that sort of thing. At least in my area, we were heavily encouraged to use "rules as written", and to only make rulings when there was no explicit developer guidance. What this resulted in was, any time I would make a ruling off the cuff, someone would instantly go to their phones to check the internet. I was pretty annoyed at the "it's a hemisphere, so it has a floor" ruling, especially since apparently Crawford initially said it didn't have one, then was like "wait, derp, read your own rules, it's a hemisphere so it does have one!".Well, they (wotc and design team) had ample oportunity to add it in official errata. It's 3 words (and floor bellow) to add to spell description. Since they didn't, by official, RAW, Tiny hut (2014) doesn't have floor. What Crawford said on social media, is his personal opinion, not official rule as written from WoTC.
AL uses opinions from social media? Well, that just sucks.
Basically it comes down to, is LTH a hollow half-sphere (in which case it wouldn't have a floor) or does the spell effect take up the entire hemisphere. Context matters- if you had say, an offensive spell that said it's area was a hemisphere (I can't think of one, but we have cones and cylinders), then obviously anything in the hemisphere is affected. It's because we think of LTH as a sort of igloo of force that there is a disconnect.
On the other hand, I've heard arguments that it must have a floor because the spell enforces a comfortable temperature within it, which would be difficult if it were, say, erected on cold ground. Or what happens during heavy rainfall, where water would be absorbed into the soil, despite the spell stating the atmosphere inside the space remains dry?
I don't have answers, spells aren't written to cover corner cases, and yet, these edge cases are important questions, and whether or not the spell works as advertised often hinge on how a DM rules.
Something I don't think anyone has touched upon yet is the ability to change the color of LTH. I wonder if this is meant to provide some sort of camouflage, by changing it's color to match it's surroundings, or just a rare moment for a caster to be creative.