Back when I started as a helper, my boss proclaimed, "you can do everything with a skilsaw...you don't need no fancy extree stuff" (He was native Texan)
Fast forward 20 years.
I unload and use my 12" DeWalt
DW708 SCMS
and
DW744X everyday.
You will find that your speed is increased through cutting repetitions of anything you need. Blocking, headers, etc.
And tight angled precision cuts fit NICE (a word I use often - on a good day). For stairs and roof, I use a
Makita 5007MG Sidewinder - is has an Always On LED light, so even in poor lighting you can see your line.
As far as SCMS, here's some
shots of mine on various jobs.
Go 12" SCMS - SIZE MATTERS.