Is Devonthink as janky as Devonsphere? CLI interface? Lock-in. Alternatives

No networked drives.
If I try to index everything: 873693 files. 518gb. I guess this is too much?

Alternatively, would this be possible? Just indexing this:

Old Docs, folder system: 30941 files. 66gb.
New system, tagged files: 14590 files. 180gb.

Devonthink has some cool features with Hookmark that are really useful and appreciated: