When and why to deprecate filesystems

JFS, there's a name from the past. A database company I worked for in the late 2000's ended up using JFS because it worked well with the larger files and rather weird / slow disk array hardware that was being used.

As I recall, JFS's achilles heel (or, one of them) was that it was horrible at allocating blocks to growing files when there was a lot of concurrent writing / allocating. I worked up a patch set that made the allocation a lot better under those conditions, but we ran into sporadic rare corruption errors. We were trying to figure out whether they were hardware or my patch set, when the company was bought out ...