Okay -- I see the link, and I understand the arguments being made. I don't agree with them, and think the subsequent tweets are a forced reading to reduce what (maybe) should have been the case. But simply entre nous, I'll build my case, confident that I am in the minority and am not at my most persuasive.
Here's how I think the rule works:
1. Individuals can take shifts of up to 2 hours but you need to be "resting" for 8 hrs to get the benefit of a long rest. That includes elves, even though they don't need to sleep as much.
2. If your long rest gets interrupted after an hour (by a wandering monster or whatever), you only get the benefits of a long rest. That's why it is so easy to take out new parents with a longsword: they have not had a long rest after several weeks.
3. Now nothing stops you for waiting for that long rest period afterwards, but it means you don't make progress, and there's always the risk of more wandering monsters.
So that was behind my question about only some of us initiating combat, and others not, so that those who needed it could get the benefit of the long rest.
What's more, I think that's what the rule-writer intended (irrespective of subsequent tweets):
If the rest is interrupted by a period of strenuous activity--at least 1 hour of walking, fighting, casting spells, or similar adventuring activity--the characters must begin the rest again to gain any benefit from it.
We're all good enough at grammar to know that the four possibilities can be parsed two ways <one hour of walking/fighting/spellcasting/or similar> or <one hour of walking/one hour of fighting/one hour of spell casting/one hour of similar> and even the person tweeting noted it was silly to include all those examples if the latter was intended, since combat never lasts 600 rounds. Mearls says they meant the latter, and I don't believe him, nor do I believe that's what was intended. If it were, it could have said
"If the rest is interrupted by one hour of strenuous activity of any kind (including walking), the characters must...." or whatever (even putting any item before walking would suggest that).
Also, applying real-world logic to recuperation from adventuring is always dubious, and can usually be played for both sides.
Now I won't complain CB (or the group majority) wants the more generous ruling, but I've not seen anything that makes me think it's the plain reading of what was written.
(There's other dials that could be turned -- an interrupted long rest comes with a level of exhaustion or whatever; but I find that more harsh.)
Anyways, them's my views, and I've found it works pretty well (players accept it and can rationalize it). Fun, fun.
