As for closed source solutions, I'd say Readwise Reader (https://readwise.io/read) actually innovated a little bit for the first time in over a decade by catering to power users, but I didn't use it often enough to justify a perpetual $10/month subscription (no free tier what so ever).
Wallabag 2.6.1 (released earlier this year) has improved stability, better article parsing via Readability, and supports EPUB/PDF export, though self-hosting still requires some technical know-how.
I tried to install it recently to a linux container running on proxmox. I gave up after half an hour because it requires a ton of PHP dependencies and there's no instructions or script provided to install them. I guess if you use the docker version it should be easier, but that wasn't an option for me.