The buttons are really small, especially with the size of smartphone screens. That’s an even bigger problem when you consider the fact your thumb will be fat fingering the buttons, or the side of your thumb will rub up against unintended buttons. Part of why typing in portrait is bearable is the heavy use of autocorrect that basically carries the experience.
You mentioned a tablet in your post which baffles me. Because if you’re open to something that large, you can simply just get a foldable keyboard attachment, or get something like a regular 13" laptop which most people opt into. Any situation you want to long form type, you’re going to be sitting somewhere for awhile, which at that point just bring a keyboard. It makes no sense not to. Phone texting is usually short bursts.
In what situation do you have the time to type extended amounts of time, but are unable to have a backpack/suitcase/etc that had a laptop/tablet with a keyboard. What is the use case here where you’d have to type long form on mobile?
Looks like they got their priorities right
We shall not stop until all the sources have been opened!