I agree, it still works putting YW5 files on the cloud most of the time (let's say 99.99%) but on the other hand when it fails those folk are guaranteed to email me ;-)
I have no idea how many yWriter users there are, but obviously my target is zero emails about problems with yWriter.
Most of the time, the emails I get reporting lost projects are to do with people trying to restore a backup and partially overwriting the existing files, people trying to open a YW5 project from a zip file (doesn't work), some folk who start editing the sample project and then lose it after a reinstall, disk failures, unexpected Windows reboots, logging in as a different user and the like. In every case I've helped to get the data back. sometimes with Windows remote assistance and controlling their mouse with mine, other times with screenshots and so on.
Right now there are a couple of bugs I need to fix, but after the mammoth 2-3 months earlier this year where I did nothing but yWriter programming, I'm happy it's all running pretty smoothly. I couldn't support yWriter if it was a buggy mess, that's for sure.
And now, back to writing. I'm doing Nanowrimo and I'm about 9k from finishing my latest novel. I've also put together a 6-day series of promos for one of my box sets next week, which took hours to organise.
Not sure whether anyone here uses KDP or Amazon Advertising, but I wrote a tool called SalesScanner which imports the reports and breaks sales down by day/month/etc. I'm working on a feature now which lets me import the advertising reports too, so I can see spend and net per title.
Cheers
Simon