JdeBPIn the spirit of there always being 1 more #vi clone than one thinks, notice that @lpar 's list is lacking Ali Gholami Rudi's #neatvi which is packaged in #pkgsrc and about a decade old now.
https://pkgsrc.se/editors/neatvi
And even then the rule still applies. There's 1 more clone: Sterling Huxley's and Brent Roman's #viless, a quarter of a century old and what #BusyBox supplies.