Seems like a lot to do with only $2.7 million funding and so little time
Even if Librem 5 could make it in a usable form, what apps are going to run on it? without an apps ecosystem any platform is dead
Mozilla tried to make a Linux based OS for the phone and they couldn't make it with a $500 million a year revenue as a non profit
I'm leery of these crowdfunding type people, for example they promise Matrix integrated into the phone, Matrix is a mess right now to get working properly and that is in the semi stable Android system, month and months of debugging by volunteers, and Purism promised that they'll have it integrated working properly on their system, little details like that makes me not trust such projects, too many enamoring words but software development is hard
Best option currently is a Google-free Android fork on compatible devices
https://lineageos.org/