Except.. compliance staff who want to use some ahem wonderful standards complaint reporting tool.
There's just one solitary mention of Informix in the whole discussion, as I'm typing this. And that's a comment lumping Informix with everything else commercial and expensive.
I thought Informix owned the embedded dB space at a certain rollout complexity. Remember the backups... Informix speaks json too, including at some quite low level primitives. Whether you buy a product like Informix Edge plus tools or not, depends on what is sending the time series data.