The unspoken rule of DOM is that most of the activity should be read-only. And DOM is more for industrial computers that operate like that. So I'm not surprised at your DOM's failure.
In 2004 I bought a laptop. All well and good. The HDD died and took everything with it. Fine. I had backups. I debated whether to go DOM, or get a pata/ide SSD, CFconversion, or a conventional spinner.
DOM at the time didn't have enough capacity. And most are not laid out like SSD.
SSD at the time was way too high priced, too new, and underdeveloped.
CFconversion felt like a bastardized mod.
And I never liked CFconversion. It's more of a hack job shoehorning one type of technology into the duty of another. While this is fine and good for experimenting and trying new things. Flash technology is just too delicate for such escapades.
DOM or SSD wouldn't have been much faster except in certain situations calling for a lot of random access to many small files. And even then, there's ways to group those files all on the same track. It's a utility computer and a high-reliability computer. And it's living up to the task. Had I gone DOM or SSD or CFconversion, I'd either have converted right back to traditional HDD or continued spending money trying to make a solid-state solution work.
I went with a Spinpoint Spinner drive. This drive, today, after near daily usage for nearly 10 years, still continues to function. I purchased 2 more of these drives for spares for the future and I check the S.M.A.R.T. data about every year or so on the installed drive. Quite pleased overall. Either I have a magic touch or the drives are that good.