The camera cpu cannot handle 60fps...there is absolutely no need for 60fps with respect for surveillance cameras..4k is not needed either and in fact are significantly worse in low light scenes compared to dedicated 1080p low light cameras. https://ipcamtalk.com/threads/dahua-starlight-varifocal-turret-ipc-hdw5231r-z.14683/With h.265 VBR, it is possible to dynamically adjust the quality when motion is detected. or if the camera has a sub-stream, you could potentially have a 1080p or 4K20FPS sub stream that is recorded 24/7, and then a rolling buffer from a 4K 60FPS stream of around an hour where when motion is detected, the motion highlight will contain video data from the 4K 60FPS stream along with a user selected time period before and after the motion event.
Today, you can buy a smartphone for less than $300 that will do 4K 30FPS with OIS (e.g., the Axon 7). if you have an IP camera with no AMOLED display, 64GB internal storage, multiple RF front ends for cellular data, Bluetooth, WiFi, and NFC, along with many other components not needed in a security camera, the least they could do is make an IP camera that takes the camera aspect to the next level.
Make it so that it is up to the user to determine the frame rate and quality they record at. A user with 100+TB of storage may be fine with 4K 60FPS using h.265 VBR.