When did monitors with physical knobs for brightness and contrast disappear from the market?

Of all the features of computers that disappeared after being taken for granted in the '80s and '90s, this is one that I miss the most. I'm constantly adjusting monitor brightness due to changes in room lighting conditions during the day, and it's much, MUCH easier to do this with the quick flick of a knob instead of a slow trudge through on-screen adjustment displays.

Until the electron gun gave out after 18 years of daily use, I still used a 17" Dell CRT from 1998 with physical knobs. This may have been one of the last: By 2000 Dell's manufacturer had switched to on-screen menus and buttons, which stuck in my craw. But could physical knobs have persisted a little longer on higher-end monitors?