I'm not happy about the data I lost, though it could have been a lot worse. The file system is mostly accessible and more files than I first thought are recoverable. I'm also fairly sure the really important stuff is in multiple places.
But... I ordered a replacement, which was an SSD. I had the choice between a HD of approximately the same size as the one I was replacing, or an SSD of 2/3 of the size for the same price. Given the likely cause of the crash was that my laptop had been pulled onto the floor a few times by my toddler, and probably not helped by it bouncing on my lap over the last four years, SSD seemed like a good idea.
And it was. My machine is completely silent, and feels a lot faster. Which makes me happy.
So then, because Ubuntu hasn't been entirely going in the right direction lately, I did some experimenting with alternatives. Fedora was... unstable enough during installation and set up for me to feel it probably wasn't the way to go. So then I tried Mint. Have you tried Mint? Mint is Ubuntu. No, really, it is, the repositories are the same with one addition. But that one addition? That's a bunch of packages designed to fix Ubuntu.
With Fedora I tried GNOME Shell (not really my thing), GNOME Classic (God awful, what the hell is wrong with these people?), and Cinnamon (what GNOME Classic should have been - wonderful.)
And so I installed Mint with Cinnamon. And it installed without any problems, and made it easy to set up the proprietary drivers for my laptop, and "just works" because it's really Ubuntu in disguise, and it all works. Which makes me happy.
But I missed having Mac style menus at the top. And found there was a plug-in/applet/whatever for Cinnamon that does just that. And it turned out all you had to do to install it was download a zip'd snapshot from Github, and unzip it to a directory inside .config, and install some Ubuntu packages, and then enable it and reboot.
And it worked. Which makes me happy.
And finally I reinstalled Steam. And checked which games I had were capable of being installed under GNU/Linux without Wine. And Saints Row IV was one of them. Which makes me happy.
So, I could get upset about the missing data. But I'm hopeful I haven't lost anything important that isn't backed up somewhere else. And obviously I'd have rather not paid money for a new drive and a USB SATA adapter.
But somehow I seem to have ended up with a much nicer computer at the end of it. Sometimes the Universe balances itself out.