"Apple engineering has confirmed that 3D Touch multitasking was intentionally removed in iOS 11. I am livid."
If you weren't aware, the 3D Touch multitasking feature lets you press on the left side of the display to easily bring up the app switcher. A press and swipe will quickly take you to your last open app.
Here's what Apple had to say...
Apple Developer Relations
Engineering has provided the following information regarding this issue:
Please know that this feature was intentionally removed.
Did you use this feature? Let us know if it's something you'll miss...
Read More [via reddit]