>>10303140>>10303147>>10303268There are some technic compatible balls and sockets still in production. This includes design 67695 (pic related), the latest in a lineage of classic toa hand pieces dating back to Slizers/Throwbots. Bohrok eyes are still being used in lego sets to this day. Moreover, modern technic uses a wide variety of technic pieces, and use them in various creative ways. For example, just look at this year's 42151 Bugatti Bolide.
https://www.youtube.com/watch?v=ZuApNP-OGxMMakes you wonder what would happen if the current technic designer team made at least one Bionicle set someday, doesn't it?