I am currently looking into a self hosted Paperless-ngx installation . I already run a small local proxmox server, where parperless-ngx can easly added as a docker container. Just have to figure out how to migrate my > 10.000 notes wihle keeping links to other notes functioning. I already have a full enex-export of all notebooks via the legacy client as a starting point.
As a interim solution you may use Evernote 10 alongside the legacy version, which is what I am currently doing. With Evernote 10 I can see all my PDFs in notes, the legacy client still syncs with the cloud and allows me to keep my offline copy current and work with existing apple automator scripts.