Merging every region of one stroked shape is a no-op again: only fill
parts count, so a vector with several painted regions still merges.
The region paint import budget now covers the whole file instead of
resetting for each layer, so instances of a main with large region paint
stacks cannot multiply the work.
Boolean operands are editable in place with live results (per-operand operations, cached prefixes so a drag recomputes from the edited operand up); a Design panel Arc section; the shape builder takes strokes and open paths as outlined areas; variable width points can be wider on one side.
Skyfuller1303