It's a meme, man. I did the van thing for a year while working in Australia on the NBN (big fibre optic project).
Drove around and spliced and oversaw fibre projects.
It gets old pretty fast, has tons of hidden costs, and looks quaint and romantic to people who've never had to do it. Fun for a year, but I probably would have paid almost as much just booking into hostels or AirBnB's and renting a car on occasion.
I was able to go and see some cool places -- but breaking down in remote South Australia was scary and frustrating. And you get really, really tired of the lack of space.
What made it tolerable was being able to get out of the van and chill in places like the library or a coffee shop-- likely all no-gos in the COVID era