Double performance (which is arguable at best) sounds like a lot if not for the god awfull performance of the igpu anyway (intel, vega is a bit different)
I would prefer to spend the money on thunderbolt (egpu box will be expensive but the gpu for it could be something older and/or 2nd hand)
something that will be garbage now and need to be replaced very soon anyway
Quotea waste of silicon, money and pcie lanes
i think mx150(250) is the best laptop gpu ever. double the performance from the best igpu for 50usd. must have thing.
a waste of silicon, money and pcie lanes