Midphase
However for many stand-alone artists, we would prefer to remain in the OBJ context while still having access to the more up-to-date render engine that Karma offers.
That is similar to how I feel as well. USD and Solaris are adding a level of complexity to scene building and management that wasn't there before.
You can't really start your scene from scratch and build and tweak everything on the go. USD/Solaris expects you to have pre-built assets, take great care with naming and collecting them, and wrap your head around terminology that changes between SOPS and LOPS.
I don't really want to import an asset from SOPS and tweak it in LOPS with a Sop Modify. But I also don't want to jump between the Obj and Stage context all the time.
That being said. I do like working in Solaris and I love the general idea of USD. Dreaming of something like USD, a standard that every major software will implement, that is literally the whole scene, was unthinkable a few years back. Adding the camera of your 3D scene into your compositing software with ease because it understands USD will be amazing. Sure FBX and Alembic can do that right now, but you'll be working in USD anyway and won't need to export it to something else. And it will enable more render engine variety across all software that supports it.
Then there is the node-based layer approach of Solaris which is just incredible compared to the loose assembly of nodes in the Obj context. It's much clearer and much more like working in SOPS.
Need a different light setup for the second shot of the sequence? Just branch it like you would when creating different versions of the same model in SOPS. This is also SO MUCH easier and clearer than using Takes. For me, this way of working feels much more “Houdini” to me than the Obj Context.
Then there are the benefits of easier reusing/importing scenes. Load the old USD file, prune everything you don't need. Then realize you need something else. You won't have to reopen the scene file and copy-paste again. The whole scene is referenced in the file you've imported at the beginning.
These are some of the reasons why I am going to force myself to use Solaris more (I can't really for actual jobs right now as I am using Mantra as my main render engine and Karma simply isn't ready yet, but I dip my toes into Solaris every chance I get).
Maybe I will be able to adjust my workflow to better fit into USD but I do think that it will be worth it for the benefits we can see right now and in the future.
We also shouldn't forget that one or two years ago almost nobody used USD besides the creators of it, Pixar. So it's to be expected that it's geared towards these kinds of companies and workflows. It's not been that long since the wide variety of audiences that Houdini serves have come into contact with it. I do think it's critical to make us heard, to assure that Pixar and SideFX are thinking about Solo Artists as well while adding to and changing USD and Solaris but I'm personally very optimistic that the future of Solaris will be good for my work. Maybe it will never be as easy as mashing together stuff in the Obj context but maybe the benefits will outweigh this.
Not sure if I gave anyone a valuable new viewpoint on this or maybe what I'm saying will simply not fit into your workflow, but in my (very subjective) view I see this as a chance.