How many interviewers for software development jobs in Europe do even know what a Github portfolio is (serious question)? The developers will at least know what

How many interviewers for software development jobs in Europe do even know what a Github portfolio is (serious question)? The developers will at least know what Github is. But the idea of having a Github portfolio or developing software for fun and for free is definitely a foreign concept for many. I wouldn't mention this at all when interviewing for a position in normal (boring) corporation in Europe.