I think part of the reason more machines are not suporting abs is that it's a pita to print. And people might associate the problem with the printer rather than the material itself.

Sticking to cold bed filaments generally gives more succesful and easier prints with fewer temp issues. And users will be more likely to have postive thoughts about the machine.
Most of these new all enclosed jobs are aimed at people who might not be inclined to furtle with the kit.
Plus it's cheaper to make a machine without a heated build platform. ALso without the constant expansion and contraction from heating and cooling - calibration is easier. And build platforms can be thinner and cheaper. A lot of new machines are coming with thin removeable plastic print beds.
Dunno if this one does. But it's getting pretty common.