Earlier quoted context omitted.
Interesting concept, but Facebook login + my (unique) real name (yes, there's only one of me in the whole world) + unencrypted PRIVATE journal with subconscious gibberish + possibly my email address = privacy hell. I'd rather install this thing on my private webserver.
The analysis that 750 words does is very unique and interesting. You don't have to connect it with Facebook or your real name. You may create an anonymous account. Personal computer are very prone to failure. You will have to save your information somewhere on the cloud. They all shady. It is a compromise that you have to make based on your best judgement.
It doesn't have to be him who is the weakest link in that security chain.
What I don't get from your posting is the second part. Personal computers aren't prone to failure at all. I never had a single HDD crash. I backup my data on a second HDD just in case. It's incredibly unlikely that my data is going to be lost and that the cloud is the only solution for that.
So, there's clearly no compromise for me. Rule is: No cloud, no internet service for private data. And heck, I don't even use any analytics software or other software on my company website that I cannot self-host.