Is HiFiBerry DAC+ compatible with touchscreens?

Should the HiFiBerry DAC+ work well in combination with the following two display?

Display 1: PiTFT Plus 480x320 3.5" TFT+Touchscreen for Raspberry Pi 2

Display 2: HDMI 5" 800x480 Display Backpack - With Touchscreen

More specific questions:
A. Note that Display 1 might compete with the DAC+ for pins. Would this be a problem?
Should the two be able to plug in at the same time?
B. Here is a problem someone else evidently had with Display 1:
Do you know of any cases in which a DAC+ and Option 1 have worked.
C. Here is a problem someone had with USB audio and a touchscreen:
Might I have similar problems with either Display option?
D. Note that Display 2 uses HDMI video. Would this help to prevent competition between the
DAC+ and video?

Thanks very much.
Best wishes,

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