I had to choose what to use for my personal arch project - Blender or SU; it was from Google back then. It’s been a while now. SU was fine and easy to use without any introductions or lengthy internet rides to search for basic things. However… It soon hit the wall (well, after i had done almost all i needed) by saying that this and that is available only in Pro version … blabla. You know what follows.
I wasn’t really able to get the end product out of this and only then i realized fully that most of the features are paid addons or Pro.
Same you could go about any other “Pro” 3d soft we’ve seen posts here how good that is and how many features this has. Long story short - you get what you pay for. Blender offers most imho.
Speaking triangles - who cares you can not export SU to Blender without mess and triangles? Devs (management) over there at SU? I think they are least interested ones. Blender, as opposed, offers ways to export tessellated mesh (triangles) or quads. And the end result short before rendering is triangles in any soft btw.
Bevel is not the only tool you could use - there is Curves: make edge duplicate as Curve and use other as a bevel profile. You can adjust it’s thickness along, which might be a bit fiddly. Then there was excellent addon from @zmj100 - extrude_along_path which also can be used.
SU would take longer to form ends and was failing on occasions too.