I don't think changing from QWERTY to COLEMAK is worth it.
But if you typed with less than 10 fingers without a system on QWERTY for a long time, it's possible that the habits you formed make it actually more difficult relearning on QWERTY and it is easier having a fresh start.
Nowadays you can change between COLEMAK and QWERTY within seconds on modern operating systems.
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I don't think changing from QWERTY to COLEMAK is worth it.
But if you typed with less than 10 fingers without a system on QWERTY for a long time, it's possible that the habits you formed make it actually more difficult relearning on QWERTY and it is easier having a fresh start.
Nowadays you can change between COLEMAK and QWERTY within seconds on modern operating systems.