Vulins found every other day in some obscure package you thought you were one and done with. You get to spend a couple of hours fixing it. Oh new update on the java core you are using few more hours. Oh that update breaks 2-3 things. More time. You float the idea that someone else takes it. But those who step up have 'other ideas' what they want the site to be. Oh and your base OS is 2 releases back better get on that.
Then the actual cost. While you can get a cheap site up and going for not much. If you get even slightly popular you are now looking at a decent amount of money for many people. You may not see a couple hundred a month as 'no big deal' but many people do. You can pay a provider to take some of that patching work out of your hands but you pay for that.
The programming world is very ephemeral. We get bored easy. We move on quickly. Sometimes we are just cheapos. Things that cost time and money get left to rot or turned off.
What I find interesting in my 'internet' life. Is I always seem to find out about the really interesting places as they are being closed out :(