I still see jobs on Cobol or other technologies, so probably there are ppl still using it. UML has an overhead and a small scope, but I like diagrams in general:
for the initial planning of the project
after the first month, they should be auto generated from the code (if possible)
nowadays developers have to handle many more skills and technologies then just the coding, so we need other types of diagrams like AWS diagrams.
for the business side (flows)
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I still see jobs on Cobol or other technologies, so probably there are ppl still using it. UML has an overhead and a small scope, but I like diagrams in general: