Anyone thinking the Cybertruck will never have a 500-mile trim, just because it is launching with a 350-mile trim... is an idiot. This is simply a 4680 ramp-related issue and makes perfect sense - assuming it is even true (as it is only a rumor). They get to sell more Cybertrucks, and also at a lower retail price, which if you want the 500-mile trim, you will appreciate in the long term. Interest rates are going to come down. You don't want to be buying a top-trim Cybertruck with super-high interest rates
Having said all that, IMO the rumor is wrong, and Tesla will be debuting with a long-range trim. Works better for reviews and comparisons, which will all stay around for a long time so it's better for them to not be saying "not as much range as the Silverado EV" etc.