I wouldn't consider "soon" to mean ten years.

Six miles, 12 billion dollars, opening in 2036.

https://en.wikipedia.org/wiki/Silicon_Valley_BART_extension

What's the holdup? Do they need to source more 5.25 inch floppy drives?

Don’t forget the SF Downtown Rail Extension, planned since the 1990s supposedly.

https://www.tjpa.org/portaldtx/about-portal

https://www.caltrain.com/media/17998/download