What are its import/export capabilities, and would it be worth my while to get, considering the massive (multi-hundred-GB) DAZ Studio content directory that parallels the massive (also multi-hundred-GB) Poser content directories that I've amassed over the past almost 20 years?

Note: This import ability does not have to be perfect (for example, I would never expect dForce -> Dynamics), but it does have to be at least somewhat usable (e.g. dForm -> Magnets should work, as should weight-mapping, and stuff on that level of complexity).

I'm not saying this for myself, but consider - there are a ton of DS users out there. If you want to capture a market, or recover growth, folks who are already into CG would be a great place to start. Also, one of the greatest reasons DS grew like it did was its ability to import and use Poser content almost natively (dynamic bits obviously exempted.) Can't see why you wouldn't want to give that a go if the codebase can support it - even if it's just a ginormous python-based thing, or a plugin.

(encrypted content would be impossible w/o licensing, but those are fairly rare, and usually just restricted to scripts and plugins.)