What benefit are you looking for?
Its possible to build a hotend with a many thermal zones as you want. Gets a bit complicated to assemble, plus it gets very expensive fast.
But what benefit do you think you'll get from that cooler nozzle?
Because having wildly different temps in the zones just increases the risk of boiling the polymer when the dwell time is too long.
Plus when extruding at a high rate, that polymer flow is going to equalise the temps quite quickly.