I've been plugging away at my SaaS app for many years. Have bounced around on the "low-touch" vs "high-touch" spectrum as well as on pricing. I am in agreement with most of the article. If I could do it over again, I'd focus on finding a good niche of "low-touch,high-price". Sure you say "that's obvious", but if so, why are there so many people trying SaaS companies that are not? If you are considering Stripe, you are already off the mark. You should be having Quickbooks send quarterly or annual invoices for at least $10K. Companies will happily pay if you are solving some problem that is costing them $50K per year.
There are still so many opportunities to reduce IT costs through SaaS. I've been in software a LONG time, and I think this is a golden age, with things like AWS and Azure and third-party horizontal services for pretty much everything. Just find your niche of companies that have issues that nobody is addressing. Help them automate tedious and time-consuming things like reporting and dataflow. Help them with regulatory compliance. Think of it as consulting where they also pay for platform services.
I also take issue with "investors love SaaS". The margins just aren't high enough to make it worth the risk. You might find an investor willing to do a deal for cash flow. But I think this is like Stripe - if your thinking VC capital, you're already off the mark. Your customers need a solution and they will be your investors.