The real problem with current keyboards is the physical arrangement of the keys. Staggered rows instead of columns make them less ergonomic, the oversized spacebar wastes much of the most valuable space on the keyboard. The thumb as one of the strongest fingers has almost nothing to do, with both thumbs mostly sharing a single key while typing text. While the weak pinky finger has to cover more keys than the others. These things are more significant than qwerty vs dvorak.
Need to type faster? Spend some time practising every day and you will gain more speed within weeks than from just switching layouts. Most people don't as speed often isn't actually that important. I myself am bottlenecked by my brain, not my typing speed. Need less hand movement? Placing symbols, arrow keys etc as secondary function onto the central keys with a programmable keyboard helps with that, changing to dvorak doesn't as much because on a modern keyboard you can reach all letters without hand movement either way.
Need to type faster? Spend some time practising every day and you will gain more speed within weeks than from just switching layouts. Most people don't as speed often isn't actually that important. I myself am bottlenecked by my brain, not my typing speed. Need less hand movement? Placing symbols, arrow keys etc as secondary function onto the central keys with a programmable keyboard helps with that, changing to dvorak doesn't as much because on a modern keyboard you can reach all letters without hand movement either way.