Most of them haven't come up.
-The fighter is pretty new and hasn't had to make any death saves, or used Indomitable yet.
-The only rogue change hits at 15.
-They have felt exhaustion at 0 a few times, but that's not a new one for me.
-Cleave through usually gets forgotten.
-They have used up a couple of consumable magic items (wands, and the staff of curing), and I like how it's a semi-limited resource versus "you have this spell 3 times a day forever for free."
-Not many Magic Resistance (+save) items have come up yet.
-I do see that i overlooked quarterstaffs being two-handed only. I think I'm about 10 sessions late to start enforcing that!
-The Vampiric Mist was the first Proficiency Draining enemy they've faced, and its +8 just doesn't cut it against the fighter's AC.
-I did forget about Con drain from dying... only one person has had that happen so far. I think this one's in the "toss" bucket.

I am still enjoying the minimal prep time. I can use the online maps and guides and only have to figure out item adaptations and what statblocks I'm pulling from where.