We get this question a LOT. Please use the search. Also, 'slab city' is not an interesting title. As mentioned in our
Guide to Using StP (which you should have read by now) you will get better responses by using better, more detailed thread titles. I've changed your thread title for you.
ALSO, this is not a 'travel story' please read the forum section descriptions before posting. I've moved your thread to the Destinations forum section.
Okay, now to answer your question, a lot of things have changed in the slabs over the past decade. How good a time you have there will likely depend on who you choose to associate with. There's druggies and there's hippies and RV snowbirds and everything in between. If you're expecting a anarcho utopia, you're not going to find that there. It's got it's own set of problems. In a lot of ways it's a place where people that couldn't cut it in regular society (and not in a good way) go to kind of exist without too many people bothering them.
I spent about nine or so winters straight in slab city, it was a regular destination for me every year and I'd spend anywhere from 1-6 months out there depending on what was going on. I stopped spending time there in 2019, so others will have to chime in on what's been going on there since then.
The largest shift in attitude has been away from the roots of the former 'squatter' philosophy, and more towards a capitalist 'i got mine' type of attitude IMO; this is one of the big turn offs for me now personally. As little as five years ago it would have been
unthinkable and you'd look like a real
asshole for 'selling' your slab (a space where you can park your RV) to another person, since
it's squatted land, but now it's the norm. Also other people doing shit like making hostels and AirBnBs and charging tourists to stay in a place when they could just as easily drive five minutes in any direction and camp for free. Other things like setting up makeshift bars and selling food/drinks (instead of giving/sharing freely). Shit like that.
Once the mural that was painted on the circular concrete 'tanks' was painted over with shit graffiti (this happened in around 2017 or so) I knew folks were no longer respecting the spirit of what made the slabs special over the past 40 years or so, and that it was pretty much going to be all downhill from then on.
Now, that said, if you've never been and don't have the 'good ol' days' perspective, I'd say it's still worth a visit if you have any sense of adventure. There's interesting things to see, people to meet, it's just an interesting region of the USA in general. Go visit for a few days/weeks, and stay out of people's properties (usually marked off). You'll likely have a good time. Just don't go there expecting to retire in some anarchist/hippie utopia, those days are long gone.