This question comes up for me quite a bit. It's great that project like this exist, but if the project fails, does the environmental impact of the parts become just as bad as any other electronic device because there's no longer a project coordinating the manufacturing of replacement parts?
Additionally, refurbished Lenovo Thinkpads, while obviously not nearly as customizable/modifiable, may (emphasis on may) have a longer shelf life due to build quality (as well as general care and maintenance by the user), and are probably easily repairable by hardware repair shops.
Environmental Impact, Longevity, and Cost should be the major priorities for the conscientious discerning tech consumer, and imho in that specific order.