Here is a reply from the thread.
There is so much wrong there it's hard to know where to start.
Sleeves don't fail without something being wrong that would have told you there was an issue that needs attention. Missing what was wrong is not a reason to swap to another style of steering.
Sleeves are just threaded adjusters. You can NOT have steering on a Jeep TJ without some sort of threaded adjuster be it on the ends of the joints or a sleeve of some sort. All threaded bits used in steering will fail if allowed to be used while whatever mechanism that is supposed to lock them in place gets loose and then is driven on. That is true for ANY style of steering, any adjustable control arm, any adjustable trackbar, etc.
The stock tie rod on a TJ is technically a threaded sleeve and there are less than a small handful of failed threads in them so the design is sound and proven as it is on almost all OEM vehicle steering systems out there.