What do you think the unlimited plans are? The line access on majority of the other plans are there to be transparent instead of hiding them like other carriers. Because customers keep complaining about it, the newer plans also hide them to ironically be more like the other carriers you're trying to defend.
Yep just like t-mobile bakes the taxes/fees into the price. They still exist. t-Mobile is just less transparent about them. And here's the thing people in low tax states are essentially subsidizing those in higher tax states since t-mobile charges everyone the same price with taxes included. Well the taxes are still getting paid by T-Mobile.