4chan.org keeps a basic approach to the internet and is basically just a message board where anyone can share images and comment on them. It's the community that really has kept this porn forum relevant in a digital age. Driven by a focused bunch of individuals 4chan.org lets you post just about anything you want and all you have to do is register a free account.
Online since 2003 4chan.org has over 230,820 members and continues to grow on a daily basis. I think you can put that down to a number of reasons and you can choose the one that best suits you. Personally, I think people want to join this porn forum because they enjoy the community and enjoy being able to interact with other people who enjoy the same things they do.
Content isn't going to be a worry and nor will be the regular updates. I could make multiple daily visits to 4chan.org and I would always have something new to look at. I wouldn't expect 4chan.org to win any design awards, it is about as basic as it gets, but that's also what makes it work so well. I can browse this porn forum on my mobile and not have any real issues reading or replying to any of the threads. It has worked this long for a reason, so I say good on them for sticking with it.
4chan.org has stood the test of time and it has come out on top. Many other online porn forums have failed where they have managed to come out on top. Use that as you will but just make sure that you don't pass up another chance to have a look around at 4chan.org and be sure that if you haven't yet made an account, do that before you forget and have any regrets.