15 years ago almost everyone would recognize the name because of the popularity of the Iron Man movies.

10 years ago Jarvis became a part of Vision in Age of Ultron and effectively no longer exists in the MCU. A variety of new AI assistants with new names were made in later movies.

None of the new ones became as recognizable, and I guess Jarvis is also falling into obscurity.

Don't read too much into my only vague awareness (or person I responded to's unawareness) - I think I've seen one Iron Man film, or maybe only bits of it even. I'm just not into all that Marvel/DC/superhero stuff.

(And as a student I Saturday-jobbed at a cinema, so there's a certain era for which I've seen at the very least many odd scenes out of order for essentially all widely released films...)