Right, Pro1 can be very handy to do real things like logging into a server and do what is necessary, which is very frustrating on any touch keyboards.
However, the one and only real and well-working Linux phone I used so far which also had a keyboard was N900.
Although Pro1-X will also come with Ubports, so some kind of a Linux ecosystem will exist, nowadays one have to have an Android phone because of other services, and as it is a very restricted system, it seems for me the very same well-working environment what N900 had is not working anymore if you don't want to bring another de