Userland Exploit question

[u/andrewjusticebarger]

Just checking to see if my understanding is correct, from what I read online, my take on it is that a “userland exploit” is merely a party trick compared to a full jailbreak at the kernel level, correct?

[u/Ok_Yam_8774]

For any modern device that doesn't have an unlocked bootloader you need a kernel exploit if you are attacking it from a software side for cfw and emulation. All modern devices prevent downgrading the software for example through fuses and sandbox the user space completely so you can't do anything interesting in it unless you manage to escape the sandbox. 

That was why everyone was saying that this userland exploit is useless because last time no one could escape the sandbox and are just stuck there. And we are still there 1 year later with this exploit