When did trucks become luxury vehicles?

It started in the late 1960s/early 1970s when consumers started buying pickup trucks to use as personal vehicles and/or people who spent a lot of time in their trucks for work wanted something nicer than bare metal floors and roof. High trim trucks have been around for a long time, and while a loaded Lariat F150 from the 1970s might seem pretty basic today, it was still a nicer place to live than a contemporary base trim truck and more comparable to mainstream cars. Over the years, many thing that were once luxury features have become standard equipment. Other "luxury" features like touchscreens have become ubiquitous because of backup camera mandates and for cost reasons as a touch screen can replace a bunch of buttons and rationalize parts counts. A base work truck trim truck is a spaceship compared to a 1970s truck in most ways but they're still pretty basic compared to a normal car of today. Trucks as luxury vehicles started to take off in the 1990s as their SUV counterparts really started going upscale on the high-end as the country went SUV crazy and those features and upgraded interiors started finding their way back into their truck platform-mates. The next big boost was in the early 2000s when the crewcab configuration finally became available on the 1/2 ton trucks and people could actually use them as a real family car/people mover. Now top trim trucks are loaded with luxury features and are basically luxury vehicles (that can still do actual truck things if desired) because manufactures figured out, there's practically no ceiling on how expensive they can push the top end of their truck lines and, indeed, a Platinum F150 or Sierra Denali is a pretty nice place to hang out. Those aren't your only choices though, they still offer a whole range of trims. There's two types of people who want a basic, stripped down truck - people who say they want that but then never actually put their money where there mouth is and bought any real trucks at a real dealer, and fleet managers. Fleet managers do actually buy them so they're available to them. For the other group, they can buy them used when those fleet managers turn them loose on the used market when they're done with them because they were never really buying them at full retail anyway. They were still available for decades and sales of those configurations steadily declined until it just didn't make sense to stock them on lots anymore. The normal consumers that actually pay real money for real trucks want a crewcab and something nice enough to not hate yourself every time you climb in it so that means F150 XLTs and Silverado LTs and equivalent RAM, Sierra and Tundras are the real entry level for regular consumers, not the work truck trims. People don't want vinyl bench, rubber floor and crank windows trucks.