When I was working in IT in the 1980s/90s lots of "the big new thing" came along and then
went
mostly very technical and better than anything else
until another company came up with a better idea
I have recently heard that OpenVMS - an operating system - is being discontinued
it was always massively better than anything Microsoft came up with
(even when then recruited the person who wrote it!!)
but marketing won out as usual
sorry - probably means naff all to most people - but VMS being kicked out means ANOTHER load of my memories, expertise and experience is now as much use as if it was based on designing new Steam Trains
I too was in IT and it seemed like every ten years, everything changes. You learn one bit of software and just when you've mastered it, everything changes.
There was one bit of software, "The Last One". It was a programme generator, which was driven by user input via a Q and A dialogue. Never experienced it, but suspect that it wasn't the last piece of software.
Then Lotus 123, was really good and my favourite, but was pushed to one side by the Excel upstart.