Why do you need multitouch for 10 touches?

Question

Multitouch and gestures

I saw in one review such a text "... but the multitouch function for some reason works out only 5 simultaneous touches ...", in connection with which the question is - what, a little ??? Although he himself is a developer, he is far from games and there was no need for more than 3 touches: a 2-finger zoom and a function button simultaneously with the zoom.
In general, the question is: 6 or more touches is really used? Clarification of the question: is it really used on 6" phones, not tablets?

Answer 1

I was also looking for an answer to this question. From the whole heap of articles and videos, we can conclude.
1. For 99% of tasks, support for 2-3 simultaneous touches of the sensor is enough.
2. A sensor that supports 2 simultaneous touches has technical limitations that do not allow detecting 2 touches at points located on the same axis. In this regard, you need to use a sensor with at least 5 simultaneous touches. It did not save on manufacturing technology, and registration of 2-3 touches is guaranteed at any point.
3. Theoretically, a 10-touch sensor could have a higher resolution in terms of touch point detail (as a bonus of not saving on technology), which would accurately capture finer interface details. But this thesis must be confirmed either by technical characteristics or experimentally.