Medical apps are true high requirements yes - specially when interacting with other devices. But also games, depending on what you are doing, you definitely wan

Medical apps are true high requirements yes - specially when interacting with other devices. But also games, depending on what you are doing, you definitely want to be testing on multiple devices, specifically if you are pushing the hardware in some way performance wise. When building game engines you will also be getting different reports with different qualities from other developers, and having real devices really speeds up reproducing issues.