Same here. It got so bad three years ago that we bought an iPad, which works better for me, but has its own problems. My hands still go numb after a while, and holding it has never been completely satisfactory, but I was unable to type or use a mouse without pain and numbness so this is much better.
We were able to talk to a salesman at the Apple store whose wife has MS, with very similar symptoms and limitations to mine, and he was able to answer all my husband's questions about capabilities and ease of use compared with a laptop. He even recommended a certain case ( not an Apple product) which props it at different angles for hands free use.
It is not a solution for serious professional use, but unfortunately this seems to be a common symptom of advanced SFN.