“if you have a SAS that is horizontal in nature and you want to create the landing pages to appeal to 100 200 300 400 500 different verticals where your stask applies I think you can maybe create 10 of those pages or 20 of those pages yourself and then use programmatic SEO to do the rest”

Programmatic SEO only works on top of a hand-built foundation

Programmatic SEO isn't a shortcut. Hand-write 10-20 vertical landing pages first, grounded in real customer research and value-prop alignment, then let programmatic fill in the remaining hundreds. Skip that hand-crafted base and Google demolishes the site.