StairMaker as a 3D "place holder" + a simple wall-mounted handrail object I made + a whole lot of 2D elements in plan and section.
If I had an "Architectural Stair" that needed to be modeled for a rendering, I'd build it out of parts (slabs, etc.).
I've tried all the AC Stair objects, StairMaker, StairBuilder, and ArchiStair -- they
all
require a lot of 2D patchwork to get to a workable stair.
MacBook Pro Apple M2 Max, 96 GB of RAM
AC27 US (5003) on Mac OS Ventura 13.6.2
Started on AC4.0 in 91/92/93; full-time user since AC8.1 in 2004