The last operational VAX I ran into was at scetv in the mid 90s. No one missed it when it was shut down.
There is a VAX on some virtual machines where I am though.
NASA acquired at least a dozen different systems over the years ,, all sorts of hardware and os’s ... the last contact I had with them in the mid 1990’s they were finally getting rid of 40 year old hardware and putting all the legacy systems on a IBM 3090 running CMS/VM with each one being it’s own virtual machine ... The systems still cannot talk to each other but at least the hardware stays up.