[pjmlp]

Most likely because:

- Xerox PARC systems were too expensive for most companies. Alan Kay says if you want the future today, you must be willing to build the hardware from 15 years in the future

- The commercial attempts to bring Smalltalk and Lisp into the market failed, mainly due to mismanagement and the high prices

- The first set of UNIX clones start spreading into the industry, were much less expensive and good enough

- Attempts to replicate Smalltalk and Lisp interactive experience in common early 80's hardware failed short to provide the same experience as in the Dorado and Star systems.

- Younger developer generations educated in UNIX and microcomputer OS never experienced such systems

- Probably something else

[enen]

Thanks, that's an interesting topic

[pjmlp]

You might find these videos interesting, cross linked from another discussion.

https://news.ycombinator.com/item?id=7565751

These systems were working in the late 70's, early 80's as personal workstations. Now compare with what many developers still use today.