We run one of the largest print farms in North America. Reflecting parent's sentiment, BambuLabs' P1/X1 series are capable of substantially finer layer height and consistency (0.08mm), with SLA-quality results. We dumped all of our FormLabs because of it.
We don't sand any PLA, anymore. If we need to control the surface texture, it's largely a function of the qualities of the filament and print speed.
What PLA filament brand(s) do you recommend, on Bambu?
edit: typo
While a one-time fee seems preferable from a customer-standpoint, I personally prefer annual subscription fees. It allows for a potentially lower initial cost, making it more accessible to potential customers, but--more importantly--provides an obvious recurring revenue model for the author, hopefully implying on-going development. Ideally you would retain access to the app if your annual subscription lapses, but could receive upgrades after reviving your subscription. Whenever there is a one-time fee for an "average" app (no offense intended), I always wonder how the author can afford to keep updating it in the future.