Digital Tools I Wish Existed
It definitely does not solve all the issues listed in the article, but for me Zotero https://www.zotero.org has been absolutely brilliant as a "digital content organizer".While it is "marketed" for scientists, it is a very general tool, that allows me to archive, tag, organize and search any webpage  (with the option of taking a snapshot) or digital item.I started using it for research articles, but it quickly expanded as a general bookmark organizer, then to books and even some podcast and movies archival. I use specific folders as reading/watching/listening queues.Best of all it is FLOSS software, which is an absolute requirement for me to future-proof my use, and has an API that can be used to interact with external software. I use it for example as a document "backend" for my emacs org-mode journal (via the zotxt-emacs package).There is an online sync service offered at a very reasonable cost (including a free tier). This is one of the very rare online services I'm paying money for. My understanding is that the sync server is open-source, but not production ready for self-hosting yet. The devs are supposedly working on it.I strongly recommend you at least take a look.