@alyx I switched to a dvorak-inspired DAS keyboard 12 years ago and haven't regretted.

My typing speed was slow for about three weeks during when I was practicing, but after that my speed got better than before switching.

The main benefit has been less strain and pain on hands.

Now when I must type QWERTY (very rarely indeed), I'm quite slow and must concentrate, but in any case it's not impossible and all the keyboards have QWERTY letters anyway so you can always check what you are typing.

So I'd say go for it. (But choose Dvorak and not DAS, because DAS is optimised for Finnish.)