Remote starters have their place. -10˚F windchill isn't particularly cold, and when it is really cold some vehicles really should warm up a bit before they move.
My big problem with remote starters is when you really want to use them (-40˚) the vehicle probably won't start anyway without a bit of finesse.
If it's only -20˚C the vehicle will probably be drivable by the time you scrape all your windows.
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