There also was SCGI as something easier to implement than FastCGI, but allowing for persistent processes. So I'm sure one could come up with yet another CGI ver

There also was SCGI as something easier to implement than FastCGI, but allowing for persistent processes. So I'm sure one could come up with yet another CGI version that's slightly better tuned for a different need and still retains the massive name-brand recognition of "CGI".