>They go way back in 4chan's history.
They ARE 4chan's history.
I put the quotes around it for a reason, almost no website is actually for complete free speech, and the ones that are are flooded with child pornography spam from robots reading imageboard lists.
>Let me tell ya, haven't seen depraved people until you browse /random/ and /pnd/ on 8kun...
With all due respect, you sound berry new if that's your benchmark for imageboard depravity. Not that it's a bad thing, it's not.
Anyway, it's good to have a small array of slow, comfy imageboards (even it it's only comfy to you) such as anon.cafe. The sfw overboard is always nice. There's a few other comfy boards I've found, but they're for niche interests and not strictly
sfw, even if lewd and politics are rare.
Lainchan is a case worth mentioning of a large site where they strictly ban pornography and try to avoid low effort posts, although occasionally people start controversial /pol/itical threads on the /r/ and /hum/ boards so I woodn't yet call it fully-comfy.