Yes. I was mentioning this to @cks the other day.
https://tty0.social/@JdeBP/116030855863806427
I think that it came out in the early 1990s. The copyright dates in the source uniformly say 1983, which would make OpenWatcom vi the earliest vi clone on record (pre-dating #STEVIE by 4 years).
However, they say this uniformly, even for its OS/2 and Windows NT parts, which couldn't have existed in 1983. And 1983 pre-dates even Waterloo C. So I suspect some Sybase lawyer has lied in these copyright declarations.
Watcom had a non-vi multi-window and menus TUI editor for DOS named wbed.exe at one point.


