Some people find they don't even like them with 2.5" lifts. Some notice a difference, some don't.
Some of that may be the owner, but some may also be the combination of things, such as tire size and wheel width and offset.
They really do like less angle, so the more flat the long link is, the better.
If you're not experiencing any issues, leave it. But if you find that it's steering a bit funky, a dropped pitman arm and dropped trackbar bracket that are normally used with 3.5" lifts would still be a good thing.
And you're right about many swapping out the Inverted-Y for the older Inverted-T setup. It's not that the Y is not a great design. It is, at least for stock, or near-stock angles. But once angles go up, and tire size goes up, and especially use severity goes up, the need for the more flex-resistant design of the earlier T style goes up as well.
All depends on what you have, and what you're going to do with it.
It's one more thing to think about too, when your original stuff starts to wear out and get loose. That's the perfect time to decide whether to keep the Y, or go to the T.
But be aware too, that if you convert to an Inverted-T linkage, you may use a different pitman arm (dropped OR stock), and you do not want the dropped trackbar bracket anymore.
Paul