Around that time it was normal to have your own language if you were a big enough company. It made sense because "universal" languages were quite low quality (o

Around that time it was normal to have your own language if you were a big enough company. It made sense because "universal" languages were quite low quality (or there were commercial languages you had to buy). But, maybe there wasn't really much of thinking / planning put into it. It was just what everyone was doing. People sort of expected it. I think, mostly people thought about it as convenience, as in having all tools under your control... I worked for two such companies, but it was already the time when having your own in-house language started to feel weird. I believe that both transitioned to using something generic quite a while ago.