Even if someone is using 3.1 or 95, it would not bother me depending on the circumstance. There are still plenty of COBOL uses, which predate my lifetime. What is missing is the acceptance everything can fail, and redundancy is not an option. I saw a headline Delta still has not fully recovered, and the politicians are investigating why.
I still try to point out all who use a computer need to be prepared for it to disappear/poof at any moment, and the same for their office. Once someone can say they can reasonably quickly start over with no location or hardware from the past, and proved it by real testing, then and only then do they have a good recovery plan.