A few thoughts...

They compare the Model Y to an F150, but don't indicate if the 0-day prices are MSRP or actual sales (because F150s are usually discounted from list price and EVs have various subsidies). While each is best-selling by some measure, they're also different products - a truck VS a near-luxury wagon/crossover. I wouldn't expect them to depreciate at the same rate - they should have included a near-luxury gas-powered wagon/crossover as well (Lexus NX, maybe).

Their argument relies heavily on data from India, where a bankrupt ride-share service flooded the market. If Enterprise went out of business and flooded the US market with Toyota Camrys, I'd expect some pricing irregularity for that model.

Similarly, the US EV market (and probably some others?) is heavily impacted by federal and local rebates and tax benefits. Those surely skew the used car values as well - nobody actually paid $50,000 for a new Tesla (or whatever), they paid $50,000 - some subsidy (and that amount varied based on model, price, and the income of the initial buyer - my neighbor could by the exact same car as me for $7500 less than I could). Some of these subsidies also incentivized leasing vs buying, which then means more of those cars go on the market in 2-3 years (vs a typical ~8 year ownership for a new car).

Long story short, EVs are a nascent market, there's bound to be pricing issues. I'm not convinced we can extrapolate long-term used market values based on the last ~5 years of data.