That's fair. I'm the founder of a company building a serverless platform. I didn't want to write specifics because it may reveal details about our approach.
Isn't this a great opportunity to sell us on your solution, or get our feedback? You don't need to reveal details of your approach, but what are the actual problems you see?
As a company that has built our most recent site completely on serverless, we've become familiar with some of the issues. Though I definitely would not consider it a no-go.
That sounds like a very pertinent thing to disclose when offering a critique of a competitor, particularly when you're not able to substantiate (for legitimate reason or otherwise)
> some serious shortcoming and a lot more work needs to be put into these serverless platforms
Not actionable at all
> The approach they're taking I don't think will last
No reason given
> It really needs a redesign/restructure
Nothing here too
> And maybe they'll improve it enough by then to make it viable
What makes it (un)viable?