Why to sell? Only if someone wants it for the right price.
It is actually perfect truck for me - or for any contractor. I have cargo van and was thinking of keeping van, selling lightning and getting chevy bolt - but looks like bolt can't be purchased with msrp (base model) so my purely financial reasoning for selling lightning is weaker than I thought. Also lightning pro is pretty much perfect for my needs. So I think I sell my cargo van (and use my box trailer more if needed). Also insurance for only one vehicle is beneficial.
Short range battery not any drawback. Charge at home - after minimum 4 hours driving 20-30 min break more than welcome for me personally. Chargers around greater Philadelphia have been very good and reliable (I did put 4500miles to it without home charging).
And I started doing "real truck" things with it and my satisfaction for it has even increased. Currently I don't need pro power from it but that would also be great benefit for me (I buy houses, fix them and sell them - often no electricity at the project sites).
Also the interior is perfect for "pro" use - being dirty after remodeling and "luxury" seats don't function well.
And "pro" model technology - I can't see what I would need from higher up trims. More posing?
As a personal "car" it is also excellent, silent and smooth. Suspension is a little soft but adds to comfort. Fast on straight line, but not sports car cornering.
Summer time going for a day in jetskiing and coming in wet and tired - again a big win for vinyl interior.
So not very interested in selling - only selling if I get too good offer to refuse.
I do believe that for anyone similar needs as I have the "pro" has no competition. Not ICE trucks, no Rivian, no higher up trims of lightning.
If your needs are close to mine and someone sells it for less than msrp - you can't go wrong. Or if you can get it new for msrp - go for it.
I guess this become more of a review than an answer to question why to sell.