I have also heard that the Mac people (though possibly not Jobs specifically, as he left in 1985) didn't want the //gs to compete with it, and were unhappy with

I have also heard that the Mac people (though possibly not Jobs specifically, as he left in 1985) didn't want the //gs to compete with it, and were unhappy with having a Mac-like GUI in color on the //gs when the original Mac was black and white. It also beat the Mac to the punch with better sound capabilities and ADB. Jobs certainly had no interest in making the Mac compatible with the Lisa, and intentionally positioned it as a competitor - effectively killing the Lisa line. Sadly, preemptive multitasking didn't become standard in mainline Mac OS until OS X in 2001 - some 18 years after it appeared on the Lisa. Apple also didn't want the Mac and Newton lines to compete with each other, much as they are currently trying to differentiate MacBooks and iPads. Kind of a shame since the eMate seems like it was an interesting system, and pen-based and palmtop Macs could have been interesting as well. Today iPadOS still has many limitations compared to macOS, in spite of running on the same silicon.