Almost every program I've used 20 years ago still available today. I think that I switched from Eclipse to Idea like 15 years ago, but Eclipse is still rocking. IT really frozen in 1990s. OS didn't change at all, they just switch fancy colors and border radius every few years. Software is the same, they just add more annoying bugs and useless features, but nothing really changes. I'm still using the same unix shell and unix tools I've used 20 years ago, I'm still greping and seding files around.