Although Windows for Workgroups was largely considered a joke (Windows for Warehouses) I also remember it being pretty wonderful. It brought to Windows all the SMB stuff that I enjoyed from OS2 as well as an actual built-in TCP/IP stack. I was happy to ditch WinSock.
Indeed. In the early 90s, it wasn't necessarily obvious that everybody needed a TCP/IP stack. "The Internet" was still essentially academic, and something the average person didn't really know anything about. Small PC LANs typically ran on some combination of IPX/SPX and NetBIOS.
3.11 laid the foundations for modular Windows networking, but included TCP/IP support was two years away in Windows 95, and even then it still wasn't installed by default(!). Microsoft took a while to catch on.
Attachmate merged with WRQ in 2005, and I believe they still sell Reflection branded products that do UNIXy things, like their Windows-based X server Reflection X.