What I hate about HTML, CSS, JS, Applets...

You can't rely on them. If I code something in HTML, will it look the same in IE 4,5,6? Does it look ok in Mozilla, or Opera? And if I use CSS a lot, will netscape 4 people still be able to see the page in a reasonable fashion? And what about Javascript, do all my visitors have it enabled and what JS features do which browsers support? Do they all support DOM? Only newer ones do, do they all support layers? No. And applets, does this cause many problems as in startup times? Does everybody have it installed? Oh Microsoft threw it out of Windows XP, oh, ok, now it's back in but in an old version. Oh wait, now it's out? Let's just get back to plain text...