The primary situation where I find this behavior useful is on the web where I find Country drop-down lists. I am trying to find United States. It could be "United States", "USA", "U.S.A.", "United States of America", etc. All you have to do is keep pressing "U" until you find the match you want. It really helps when the desired match could be formatted several different ways.
That assumes, of course, that the website isn't using some ridiculous drop-down component that doesn't support keyboard interaction or tab handling. Sadly, that's about 50/50 these days.
That assumes, of course, that the website isn't using some ridiculous drop-down component that doesn't support keyboard interaction or tab handling. Sadly, that's about 50/50 these days.