One time I went without it thinking that I'd be fine and said "it won't be so bad." Went a full 24 hours without it and didn't feel a damn thing so I just assumed there wouldn't be any withdrawal at all (lol!) All the sudden I went to lay down and it hit me like a brick. The restless leg and arm syndrome is appalling with kratom specifically, but I didn't encounter depression or hardcore anxiety like with oxycodone withdrawal. Depression and anxiety are monsters even without drug use, so I'm grateful kratom wd isn't as devastating internally. I also couldn't sleep at night whatsoever but during the day slept constantly? I was REALLY tired... couldn't keep my eyes open to even watch TV.
So I feel comfortable stating that the physical aspect of kratom withdrawal is quite brutal but the mental aspect is more benign. I think with real opiates the brain is more dependent on it for mood stability. Find something to knock you out hardcore at night or else you'll just be tossing and turning in bed for 8 hours straight. Kicking kratom is a shorter ride like someone mentioned, but the hardest part is that it's legal and ultra-accessible. Like booze, you can just buy it whenever without restrictions from legal issues. The real question to ask yourself, is that if it does get bad enough would you cave in and buy more? At least with true opiate addiction you can not go back to the doctor's office or delete your dealer's contact info and call it a day. Kratom is a beast to kick... don't underestimate it!
PS: can you do me a favor and repost in this thread what it's like once you're going through it? Not many people have gone through it. I'm just curious to see what it's like for other people. To finalize my thoughts, I'd rather go through 3 kratom withdrawals in a row than to encounter oxycodone withdrawal all over again. Nothing like kicking true opiates and waking up everyday with life being a 0.5/10 and hating every second of breathing air. Makes you want to kill yourself (I'll never do it though)

Maybe I've had a great life.. but withdrawing from oxy was really the lowest point I've ever been at so far. I never want to experience anything that dark again.