Very interesting. You could propose mirroring the list of supported devices on the LineageOS wiki (which does list all devices that were supported by LineageOS in the past) and/or the pmOS wiki (the latter because older devices will likely never support current Android, but a barebones Linux install is more likely to be useful). Then people can look into reviving devices that they have access to or can buy second-hand. (A secondary goal would be listing relevant technical specs for them, so as to spot those that could be supported most easily, e.g. on a mainline kernel free of binary blobs.)