@maddy They do, they really really do.
There are currently at least two non portrait keyboard phones in existence, and a third one on its way. I've had more than one recent non portrait keyboard phone.
It's a huge pain. Android design guidelines say applications need to cater for different aspect ratios. The reality is it doesn't work. Too many applications are designed to expect a portrait orientation, and the 'mini mode' to squeeze portrait into a non portrait phone for misbehaving apps never entirely works either.
Tried it for years, gave up. Now on a Pixel 9 with a Clicks keyboard case which isn't ideal, but I have zero display and compatibility issues.
@maddy The N900 came from a somewhat long line of Nokia Internet Tablets and was the first and last phone to run Maemo*, the N9 and N950 ran Meego. https://en.wikipedia.org/w/index.php?title=Nokia_Internet_Tablet&useskin=vector
*not counting Maemo Leste, which is still in active development today