The language(s) of future will be fifth generation languages. Current languages are not able to support more than 100M lines of code in one project and more than 10-20 years of continuous development.
In future, we will have something like that:
#... We are wrote large project using HTML7, but HTML8 is just released ...
$ spm update
...
12826 source files will be updated, 2324 new source files will be added, 343 source files will be deleted. Proceed? [Y/n] y
...
Done
#... OK, let continue our development ...
PS.
I have demo. I hate developing in any 3/4GL language now. :-)