Thanks. Looks like both Multiplan[1] and Excel were p-code. However, Multiplan was wiped out by 1-2-3, and Excel ... adapted (it certainly isn't p-code today or anytime in recent history).
http://en.wikipedia.org/wiki/Lotus_1-2-3 (Decline)
"The inability to fit the larger code size of compiled C into lower-powered machines forced the company to split its spreadsheet offerings, with 1-2-3 release 3 only for higher-end machines, and a new version 2.2, based on the 2.01 assembler code base, available for PCs without extended memory. By the time these versions were released in 1989, Microsoft was well on its way to breaking through Lotus' market share"