My apartment is compact. I have a desk, but no proper desk chair so writing at my desk can be uncomfortable.
I sometimes write sitting on my chase lounge which can be comfortable... for a while.
I sometimes write sitting at my pub style kitchen table. Comfortable... for a while.
I sometimes write sitting in a rocking chair, or on the piano bench... for a while.
In the end run all of these options choose to be uncomfortable and the flow of my writing is interrupted by protesting muscles and joints.
The most comfortable space for long sessions of writing - my bed.
One day I hope to be able to afford a custom workstation and high-tech ergonomic chair. Until that bright day I have taken to spending all day in bed.
Sounds decadent no?