Is IOS 17/18 even possible to jailbreak?

I know they are jailbreakable on older iPhone's/iPad's and IOS 18 on iPad 7th Gen. I'm talking about newer devices here.

I've read somewhere that IOS 17, especially IOS 18, is made very well. Like it has 0 bugs and it can't be jailbroken.

And it's been a long a long time since the last jailbreak and we don't have any news about a jailbreak for IOS 17, and not IOS 18.

Is it because it's not possible or the developers of jailbreaking just stopped working on jailbreaking?