I was maintaining a custom piece of PL/I software until 2010 when I changed jobs, as far as I know the place is still using it. I suppose I have potential value

I was maintaining a custom piece of PL/I software until 2010 when I changed jobs, as far as I know the place is still using it. I suppose I have potential value as one of the few people (barely) under the age of 40 that have experience in it.