Specific technologies that won't change:
- Unix. It's been in use since 1969, runs on almost every device. It isn't going anywhere.
- In particular, become fluent with its ideas and the CLI. That group at bell labs was hands down the best programmers doing the best programming.
- LISP. It's been in less use since 1958 and influences almost every modern language. It's like learning greek classics because of their influence.
- HTTP. The basics of the internet haven't changed and work pretty well.
- Text. Text is the best way to convey information. Nothing beats it. Not pictures. Not audio. Not video. Learn text manipulation.