There certainly are times when it is beneficial to know the chipset. That is limited to chips that have documentation available, (which is less than all scaner chips).
There is another method of developing a usable driver for scanners. That involves having an OS upon which it does work, then monitoring the usb bus for each different setting. Then that bus log is to be converted into useable source instructions. The tool used is usually usbsnoopy. There is no way to tell when in the future a driver can be made available. Someone needs to step up and begin a long, difficult endeavor. The driver is only available when it is done. And some who start the effort do not complete the journey. As far as I know, no one has yet committed to developing for the LiDE 70. Good luck on your search. Gerald