The moat for SaaS is gone. I am 99% certain I could build to parity in a weekend using Cloudflare without the the pricing limitations. I am thinking it would be within the free tier of CF usage. I am not certain I have the bandwidth to communicate over delivery and plain text inspection concerns.
I'm reminded of the infamous Dropbox Hacker News comment[1]. If you're looking at stuff like this thinking "what's the point? I could just make that myself" then you're not the target audience in the same sort of way Ikea isn't trying to sell stuff to carpenters.
This is true even when the barrier to entry in making these sorts of systems has gotten way lower.