On the one hand the lead was infinitely proud of being able to have 2 (or was it three?) monitors on his desk, big CRTs on a desk designed during the Cold War, by a designer who had nightmares about nuclear blasts and wanted someplace safe to duck and cover. You could do that with Macs but not quite yet with Windows. If memory serves, Linux got that ability before Windows did but don't quote me on that.
On the other hand they were writing what is ostensibly a concurrent application on an operating system with no protected memory and no pre-emptive multitasking, so the whole thing was using hand-rolled cooperative multitasking via C longjumps. It's no wonder the Windows team had an easier time keeping up with Netscape for that golden year. They were from what I understand cross compiling, and the Windows team could just do Windowsy things with a fifth of the staff.
So my experience of this era, through that lens, through learning to hate Macs at the hands of Mathematica, and also through rumor mills, was that a lot of Apple's OS people ended up going to Palm, where they made pretty much the same set of tradeoffs. It was very weird watching subsequent Palm models start to bump up against the same ceiling that NextStep was helping Apple route around.
I told my Mac loving friends to talk to me when Apple had a modern OS. So when NextStep merged my ears pricked up. My first Mac ended up being an anomaly. Apple briefly produced a 13" Mac with a discrete video card, which they haven't since. I had been struggling to get Linux drivers for a Fujitsu LightBook, which was ridiculously small, but was practically obsolete by the time I got everything working. That device is the sole time I've contributed to Linux, which was cool but exhausting. So I ran to a pretty UI, works out of the box, but ships with /bin/bash with open arms and never looked back.
You could still see the bones of NextStep in OS X for some time.
The university ended up with upward of 60 NeXT machines (which I later learned is a lot for one college), in 2 labs when I started, eventually in 3 that I knew of, one of which I ended up with after hours access to. On many occasions they were the only open machines. I had helped too many people who lost their papers to faulty disk drives and learned that the best way to write a paper was to keep my Unix account empty and mail myself copies, so it hardly mattered that I didn't have a floppy for the NeXTs. It didn't hurt that they never figured out how to meter the NeXT laser printer, so while it wasn't the best or fastest printer on campus, it was the only free one. "Your printah is out of paypah."