Has anyone considered the possibility that an EBH might reduce the life of the catalytic converter...??

If the ICE is heated from sources other than burning gas then wouldn't that result in delaying the catalyst reaching operational temperature....??

I would think a small cabin heater would accomplish much the same thing and not compromise the catalyst's "life".

The engine/transaxle ECU in my '01 AWD RX300 is programmed to delay, with a "cold" engine start, upshifting the transaxle, and and for the initial few miles not using OD at all, so the catalyst will more quickly come up to the ~800F operational temperature.

I would imagine that any of the Toyota HSD vehicles will be programmed in the same manner, or even moreso given the difficulty, engineering wise, of keeping the catalyst up to operational temperature when the ICE is shut down for extended periods.