The number one thing on that list is "limited pool with relevant skills" and not an actual talent shortage. IMO this is more from asking for specific combinati

The number one thing on that list is "limited pool with relevant skills" and not an actual talent shortage. IMO this is more from asking for specific combinations of skills used at a company than anything else. You need these two programming languages, this database, this frontend framework, these devops tools and these other skills would also be beneficial. Generally, you're better off hiring as "if you are competent with one of these and willing to learn the others, you should apply". The broader the stack the more learning curve should be assumed with the hiring process. But it's not in a lot of cases. This also goes hand in hand with the professional development opportunities cited at the beginning of for retention sake.