My critique of Seba's analysis is here:
Shorting Oil, Hedging Tesla. There are some real methodological and conceptual problems. Specifically, an IO A-EV that owners can put to use optionally in a fleet service market undermines Seba's conceptual model. If you include the option of private use and public rental in IO A-EV, then this clearly has higher value than A-EVs in commercial only fleets. Thus, there will be an equilibrium between private ownership and fleet ownership. Seba's model fails to anticipate this sort of equilibrium, leading to the radical extreme that private ownership is ultimately abandoned. He has not thought deeply enough about how economic markets set the value of income producing assets, and how that most surely will apply to private autos.
BTW, my background is in housing economics. There is an equilibrium between private homeownership and rental markets. It would be patently silly to argue some technological shift could come about to turn us all into renters. Even Airbnb, actually serves to enhance the value of private homeownership. Likewise Uber et al serves to enhance the value of private auto ownership. In both cases the private owner receives an option to monetize their asset in effectively a rental market. This option to monetize adds to the price a private buyer is willing to pay for the underlying asset. So disruptive technologies like Airbnb and Uber actually support asset prices for both private and commercial owners. Technology increases such optionality. What would be necessary to make us all renters would be government like regulation that bars private homeowners from renting out their homes or rooms, such that they only entities that can offer rental units are commercial entities. Technology generally does not move in that sort of direction.
So when Tesla embeds a ride sharing platform within Tesla vehicles that give all Tesla owners equal access to various vehicle rental markets, they are effectively undermining the commercial fleet model. This optionality enhances the value of privately owning a Tesla. Consequently, it will support the price Tesla can command for new vehicles. Why in the world would Tesla a Model 3 to commercial fleet operators for $30k (as Seba seems to assume), when they can sell to private owners for $40k or so? Furthermore, if commercial fleet operators need to rent out at say 12c/mile to break even on the full cost of ownership, why couldn't a private owner be willing to rent out below 12c/mile? The private owner does not need to cover the same cost of depreciation per mile because they have excess mile capacity that would otherwise go unutilized apart from ride sharing. Thus, the private owner has a marginal depreciation per mile cost that is practically zero, while the commercial fleet operator must recover that 8c/mile of depreciation. Thus, private owners are willing to undercut commercial operators. This happens in the same way that private homeowners use Airbnb to undercut commercial hotels. So Tesla can support high prices for new cars and avoid disruption from commercial fleet operators or car sharing platform operators simply by offering their own ridesharing platform and embedding that optionality into the new car itself. It's all well and good if fleet operators and platform operators want to use Tesla vehicles too, but there is no need for Tesla to offer those vehicles at a discount. So Tesla can retain all the value of these ridesharing markets simply through the price of new vehicles. Tesla just needs to make the vehicles so that they are easily monetized by private owners.
Musk has already disrupted Seba's conceptual model.