Re: It isn't C that was/is fragmented @Bitsminer
LOL!
A friend worked on databases at UCB, Ingres, ASK, Postgres anf others. He was at ASK when the takeover by CA was announced. More different corporate cultures you could not imagine. Apparently Oracle had a recruitment van parked outside within a couple of hours, Sybase a bit after that.
By the end of the day over 90% of the development team had quit. That was the final nail in the coffin of Ingres as a leading product.
I worked extensively on Oracle & Ingres back in the day. By the mid 90s Ingres was reliable and low maintenance but was looking VERY out of date by then.