Basically the title. But allow me to paint you a picture:
You’ve devoted hours and hours and hours to your build. The pit. The Boss ladder. High level nightmare dungeons. The content is engaging, but still challenging and you want nothing more than to have the monsters that plague sanctuary tremble when you log into your account. After some really phenomenal rolls of loot, you finally find it. It’s an IP 925 chest piece with all of the right affixes, but it has not one, not two but three Greater affix rolls. Sure, the aspect is wrong, but thanks to the new Codex of Power fixes, you can put that crit of just the right aspect onto it with no problem. Your item is perfect in every way. You can masterwork it over and over so that the flat damage reduction, at some point will have that sought-after orange text and nothing in all of Sanctuary will be able to kill you.
After pinching yourself to ensure that you’re not dreaming, you take your brilliantly masterworked (first time btw), Triple GA chest piece to be tempered. You’ve been playing through enough content that you have plenty of manuals and materials, all it needs is a little bit of luck.
Your first tempering is fine. A lower roll on the exact affix you were looking for. No big deal, you use another manual and… well it’s a high roll, but the wrong affix for your build altogether. You don’t even use that skill. So you roll one more time and it’s the wrong affix again. With 4 options from each manual, there’s still a shot that you ca- No. That’s just a worse roll on the same wrong affix.
But now you can only temper the item two more times. And you still have to hope for the right tempered aspect for your resource manual that you were going to put on your chest piece. You temper for resources once and get the wrong affix. Then again and it’s the lowest possible roll for the right affix.
Your Triple GA chest piece, with masterworking done just right now has a low roll of one tempered affix, and a completely unusable roll for the other. You stare at the big, orange ‘0’ that shows how many more times you can temper the item. After cosmically perfect luck, grinding through hundreds of dungeons, your chest piece is good… great even. But it will never be perfect. Sighing to yourself, you post that you’re looking for group, and silently hoping that you will, some day, find another chest piece as good as this one.
Just hope your tempering luck is better next time.
Ultimately, I think that this is a massive improvement for itemization, but allowing infinite masterworking an limited tempering is going to take some really awesome rolls of gear and sour them by putting the wrong affixes or just sub-par rolls on them. I’m stunned that the developers didn’t think of this because the first time someone has an incredible item that becomes unusable because of bad tempering luck is going to be such a gut-punch. Give us unlimited tempering. Make it absurdly expensive. Make it so we have to kill Tormented Lilith for each reroll. However it’s done, just make it doable.