Can't speak for physical documents in general, but personally I really appreciate paperless-ngx for it's general document indexing/storage. Being able to scan and ocr physical documents (usually using the camera on my mobile phone) is very nice, but I mainly use it with pdfs that paperless automatically fetches, ocrs (if necessary), and tags from my email inbox, or which I copy into a specific local folder which gets synced with paperless.

Getting all my invoices from last year to prepare taxes is now just a simple query in the paperless UI, the result would be about 95% digital and 5% physical documents, probably. Of course I could do all that old-school using filesystem folders, but having all my documents indexed and searchable in a single place was definitely worth the (small) effort of setting it all up and keep it running.