Celebrim said:
That is pretty much exactly my point. You can divide DMs into two groups: those that don't set adventures on the elemental plane of fire, and those that do.
This is incorrect. You can actually divide DMs into three groups: Those who don't set adventures on the elemental plane of fire, those who do, and those who
would set adventures on the elemental plane of fire if only it were a more interesting place
to set adventures (and if only it were a place where most PCs could survive for more than a couple of minutes). For this third group, the way the elemental planes currently are most certainly
is a problem, and it's one they avoid by simply ignoring their existence the vast majority of the time.
Celebrim said:
When I hear them say, "The elemental planes aren't conducive to adventures", what I hear them to mean is, "The elemental planes aren't conducive to adventures in the familiar pattern."
Well, your own inference is just that - your own inference. The fact of the matter is that as things stand now, under the core rules, two of the elemental planes - fire and earth - are not conducive to adventuring in
any pattern. On the plane of fire, the party will be taking massive fire damage every single round, and even if they have some way to deal with that, they also can't breathe and will suffocate in a couple of minutes. On the plane of earth,
the party starts out embedded in solid rock, can't move, and can't breathe.
Now, of course DMs could choose to have the PCs appear in more hospitable locations on these planes - but that's just admitting that these planes are useless as adventure locations without DMs making changes to them. Why not make them more open for adventuring from the beginning?
Celebrim said:
At best, we are going to get new elemental planes that are effectively the same as the old planes but with a 'New and Improved' sticker stamped on them. At worst, we are going to get every plane of existance looks basically like Earth with a slightly different color pallette.
I rather think that there's room for a happy medium between those two extremes.