It is. It's the first M1 model still with the touchbar and the old display. So far it hasn't been discontinued, but de-facto replaced by the current 14 inch model.
The 14in is 60% more expensive than the 13in for the base models and Apple are still selling the 13in as current on at least the regional website. So that doesn't count as replacing to me
True. I guess it's the slightly enhanced version of the M1 Air. Additional connectivity, touchbar and a fan for sustained loads. If that's not required, might as well save the $400 and buy an Air as they're the same in all other aspects.