What significantly else? These seems to be many reasons why people dont use Lisp.
Commercial software + hardware required to comfortably run Lisp Machines was more expensive than UNIX workstations.
Having paid for UNIX workstations, most shops would just use C and C++ instead of paying for commercial Lisp packages on top, plus scripting languages like Tcl and Perl brought a bit of Lisp like experience into UNIX.
Eventually most of the stuff that made Lisp awesome ended up in Smalltalk, Java. .NET, Dylan, Julia, Python however there is still plenty missing from the whole experience.
https://en.wikipedia.org/wiki/Interleaf
It lives on today as Broadvision QuickSilver, which still runs on Lisp:
https://broadvision.com/broadvision/quicksilver/quicksilver-...