A friend had the Fair Phone 4. It broke after a year. Hostile customer support, not worth her time. Idk. Stories of "good guy" indie companies who drop you as soon as you fell for their marketing keep piling up. It may be greed, short sightedness or an incompetent understanding of what it means to have customers, the results are the same. See Framework for another example of this.
Just checked, as of now all the Fairbud parts seem to be out of stock defeating the entire purpose. Maybe they will get more stock once the sales kick off.