This is a really good point. In my case, I'm not suggesting a price increase because it's trendy. I'm suggesting it because I've run a low-dollar SaaS for > 10 years and I can say from experience that it's easier to lower the price than to raise it. Start high and find an audience who value it enough to pay your price.
> I wouldn't pay more than $5/mo (or a $29 one time fee for something self-hosted)
And that's awesome for you, and the millions/billions of people like you. Likewise, I think Figma is expensive (but I'm not a designer!).
But the Internet is big! A new company doesn't need that many customers to do well. It's smart to choose customers who value more heavily the problem you're solving. That's why there's Shopify $360/year in perpetuity and Magento for $20k+ per year in perpetuity and self-hosted WooCommerce for no licensing fee. And they are all able to be successful. Customers that value your problem are also the type who will suggest valuable brand extensions in the future.
I got the impression that this product is marketed toward businesses. If that's the case, keep in mind that $15/mo or $25/mo or $45/mo are all psychologically in the same bucket as expenses go, for most businesses. Even most solo operators aren't price sensitive to $10/mo for a business tool they have decided they want. Choosing $15 instead of $45 could literally mean you're leaving 2/3 of the value on the table. That's value that could have gone into e.g. acquiring customers, which typically has some monetary cost. (Customer Acquisition Cost & Churn are two very real costs that people tend to ignore when modeling these businesses. $15/mo definitely covers the servers, but does it cover Churn?).
The point is to pick your niche and pricing and do it deliberately.
(Also, look at some pricing psychology as I think $15 is probably not optimal from that perspective either.)
ps -- I could write another few pages about how you get a better class of customers (more engaged, better feedback, more tolerant of bugs in a new app, lower churn, etc.) at higher price points, but that's another topic.