The FOMO for those who bought too early (paid the higher price) is worse under Tesla's pricing model vs normal automakers.
Car buyers under the normal (non-Tesla) dealership model were paying huge variances compared to other customers. Incentives/net-pricing changed all the time, but the customer never saw it. The traditional sales model involves customers going into a vehicle showroom and haggling, so each deal is unique. And due to all the clever obfuscations, it wasn't terribly clear what any one person paid for a vehicle compared to another customer purchasing the same build.
At a high level, dealerships could make margin on each transaction by...
1) Throwing the amount of factory-to-dealer incentives the automaker has offered against that inventory
2) Diverting a portion of dealer margin/holdback/sales-commission into the transaction
3) Fenagling with points/resid on leases
4) Screwing with the perceived sale-price (before taxes and doc-fees, etc) of a vehicle
5) Messing with the used-car-trade-in allowance
6) Fudging interest rates in partnership with their captive financing arm
Prior to COVID, Buyer A could get a "sweet deal" on item #4 but get absolutely HOSED on items #5 and #6. Buyers never saw items #1, #2, #3 so they were oblivious what was actually going on behind the scenes to make the deal work. Prior to COVID, the non-Tesla dealer negotiation model always had big savers (those that traded the sweat of haggling for saving dollars) and big spenders (those that just paid MSRP).
Back in 2006, I got a $55k MSRP car for $28k cash after taxes and doc fees (thanks Financial Crisis!). Someone else could have paid $40k from the same dealership on the identical configuration... and felt like they were getting a "sweet deal". There was no such thing as flat pricing, and no pricing transparency like today with Tesla. So today, Tesla's customers know who is paying $75k or $65k, and the FOMO kicks in.
COVID screwed everything up and got everyone paying MSRP (or more)... so recent pricing experience is all out of whack.
But that's why the Tesla model feels so painful to those who hear about ~13% to 20% price drops. Without all the obfuscation of all the traditional sales friction at a dealership, Tesla customers only see a reduced transaction price. There are none of the other "gotcha" buckets that come into play with Tesla. So, it feels like a much more severe kick in the groin because now some customers know how much more they over-paid compared to today's customer.