I’ve always written on a pillow with a computer on top of that. Never had a desk or mechanical keyboard but I ordered one but it’s going to take a while to arrive.
Just so I know what to expect when it comes to productivity, how have these changes affected your writing pace?
From my experience :
With a laptop my writing speed is 550 words/15 minutes
With a computer keyboard it's 500 words/15 minutes
The difference is minimal, but I think it's because on a laptop the keys are more compact, more grouped, but on a mechanical keyboard there is more space so it takes slightly longer to go from one key to the next.
That's just considering speed, however when it comes to comfort a computer keyboard is better. You don't press unwanted keys and with more space, your shoulders aren't scrunched as much, so I have less tendinosis problems.
In both cases, you should write on a desk, not on a bed, and preferably have an ergonomic chair with a small pillow in your lower back, otherwise you might get a herniated disc if you write for a long time.