Corbyn is not tied to the past and his agenda is not going to simply be a rehash of Michael Foot’s manifesto in 1983. The policies Corbyn is advocating now would not have been considered particularly left wing in 1983 and most are not particularly radical even now. Policies like rent controls, peoples’ QE, and renationalising the railways may be statist but are potentially popular solutions to issues that concern voters; the cost of housing, that QE benefited the banks and no one else, and that commuting is cramped and costly.