Guys!
Changing the sub-D levels – at least for modeling – is totally non-destructive. + or - on the numeric keypade, or right-click on the layer and select properties (where you can set the level in an input field, etc.)
It’s true that if you use “Subdivide SDS” from the Mesh Edit menu, you’re essentially subdividing and freezing in the same step – thereby increasing the base geometry – but that’s totally different than hitting the Tab key, etc.
Having only had 301 in my hands for about a day, I don’t know how that affects sculpting – but it’s important to clarify that the suggestion that you can’t control subdivision levels, or that it’s not possible to step up and down, is inaccurate (assuming I understood the question.)
Finally, re: ZBrush vs. modo – they’re each among my favorite apps of all time. But even Lux will admit to you (as Brad Peebler has himself said in his weekly modcasts) that they’re not even attempting to compete with ZBrush in all its glory – what they are doing is giving their own user-base an alternative, especially for certain smaller details that would be inconvenient to pause / launch / save / exit / launch / import, etc. – and for many people, they don’t need the atomic-level power that ZBrush provides.
I expect it will also prove useful for game content creation, etc. whether or not its ever used to create the next ILM Davey Jones. Though with the speed of software technology, don’t count them out…
That’s all I’ve got.
Cool? Cool.