4chan is in control by someone known for selling his users informations to big corporates, 8chan is in control by someone praised by many people on the internet for being a trustworthy individual.
To be honest, i have no problems with anonymous imageboards and forums as long as they aren't posting illegal shit.
Are they interesting? Cancerous? Outdated? What's your opinion?
All of the above plus you're a fag and fuck you.
You forgot to mention that the reason he is a fag is because he is OP.