The cheap piece of chalk was replaced by a $10,000.00electronic pen.
Actually we use “whiteboards” now - replacing “blackboards” (wow, that’s racist - how backwards we went!).
While I like the vibrant colors we can see nicely and so on, they have some flaws. First, markers die - and they mark other things permanently, ruining our clothes. Second, the “erasers” are god-awful nasty when they’ve been used alot, full of ink, and are not easily “cleaned” at all. I just finished a session wherein the eraser has gotten to that point and has also made the board nasty dirty.
But yeah, to your point, chalk is cheap and easy and relatively clean, too. Even compared to these fancy whiteboards.
“Technology” (LOL - pencils are tech) is far overrated.