The only way to truly get an economically "correct" typing posture is to use a keyboard that actually has keys under your resting hands' fingers. That means using a keyboard that was designed to match the shape of hands, not the shape of a 19th century typewriter.
There is no ergonomical way to use a traditional keyboard. All you can do is pick your favorite compromise. Using a better layout (like Colemak) helps a lot, but it can't fix the whole problem.
I agree wholeheartedly. I use a split keyboard and it helps a lot. Unfortunately, keyboards who really go all the way are still prohibitely expensive for most of us.
I think a reasonable compromise is "keyboards with 2-3 keys for each thumb".
Rather, with 2-3 keys for each thumb, and either using home row modifiers (with tap-hold, or with chording): it allows for really minimizing the need to use pinkies, and eliminates needing to reach for the corners where Ctrl/Gui/Alt are typically placed.
The only way to truly get an economically "correct" typing posture is to use a keyboard that actually has keys under your resting hands' fingers. That means using a keyboard that was designed to match the shape of hands, not the shape of a 19th century typewriter.
There is no ergonomical way to use a traditional keyboard. All you can do is pick your favorite compromise. Using a better layout (like Colemak) helps a lot, but it can't fix the whole problem.