The pain is how many things need special smartphone “apps” now. Can a Linux phone handle, for example, an app used for public transit? If so, how reliably and how much effort is needed to make it work? If not, what are the options for people without smartphones and do you want to deal with it? Some things have easy replacements but other things might not.
Which of those are daily drive-able? I suspect the answer to that also answers your question.
The pain is how many things need special smartphone “apps” now. Can a Linux phone handle, for example, an app used for public transit? If so, how reliably and how much effort is needed to make it work? If not, what are the options for people without smartphones and do you want to deal with it? Some things have easy replacements but other things might not.