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The definition of 'regularly' matters a lot, as players will obviously shy away from any situation in which they have the potential for this, so we can only discuss it from the perspective of if the designers intended for it to be possible.
That said I had the (mis?)fortune of dying with my group in FFXI like... yesterday.
And it was within our expectation. So, some information for you.
There is a mage enemy called a Poroggo, basically a magic casting frog.
We fought one, then moved to another with the same intention. Here's what we have to look out for:
1. Large AoE attack spells, our Dark Knight is supposed to Stun these.
2. Large CC AoE status spells, same deal.
3. AoE damage and Silence 'TP ability'
4. Single target 'Charm and transform into Frog' TP ability.
5. Self-target 'increase enemy's own magic damage' ability (Tank is supposed to dispel this).
Short version, Single target charm was used on the Tank, who is also the one who dispels effects, just as the Tank used an ability that results in magic being evaded. Now neither I nor the Dark Knight can put the Tank to sleep until the charm wears off. No big deal, in frog form she doesn't do much damage, but now we have no tank, and it falls to the Dark Knight.
So it's a split second decision of 'should we let the Dark Knight continue to take hits from both the transformed Tank and the enemy', which may interrupt spellcasting, or 'should we waste some of our potential DPS to transfer the enemy to someone else' (since the Dark Knight has to hold back their power to let the enemy target someone else).
We made the wrong call. In order to do this well, the Dark Knight must empower themselves with some abilities and magic, and at the moment she started to cast a longer one, the enemy went for large AoE fire spell. And I was in the middle of healing. So no defensive spell to reduce fire damage, and currently no 'HP Shield' on myself since if it starts to attack me I want it to do damage so it gets OFF me as soon as possible so that it doesn't Charm ME.
So down I go.
The worst part is, that if I'd survived the spell, it would only have had to use the Silence ability right after and everyone would still be low. Not unsurvivable, but the adaptation would need to happen instantly, and I'd have to Ult probably (CC Cleanse and full heal), if that was on cooldown, we'd be likely to die (the Dark Knight might survive with her Ult if the enemy didn't adapt).
Players don't fight these enemies for XP, they have other more predictable and defensive options, and death is common ENOUGH that 'prioritizing avoiding death and EXP loss' when grinding for XP is more important for many people than being challenged (but if you can avoid dying, you could conceivably kill the less defensive enemies faster).
This is also why I am wondering if Ashes will retain the current XP system which is the one I am used to. If I kill a level 11 Crab at level 6 I get 400+ exp instead of the 100 I get for a level 6 crab. Non-static exp values are a thing I generally 'assume games will have' but I realize that I have no basis for that either, I just happen to play only games where that's the case (other than BDO which I just play for contrast).
I believe and obviously hope that Ashes is planning to kill us with some Poroggo or whatever, and so far that's the experience I had in Alpha-1. If I go for something 6+ levels over, even in group, if it's not defensive, and someone goes afk, someone can fall. If someone makes the wrong decision or misses a cue to do something, someone can fall. At best your exp is meaningfully slowed while you recover from whatever.
This... doesn't seem to be the base experience (get it?) of others?