If they were the former specialist when that position actually existed, they maintained the electronics department. The built salesplanners, flexed and maintained MPG aisles, drove/owned guest service and attachments, label maintenance, cleaning, some did the revisions. It's likely that your store won't replace them and instead will spread those responsibilities around to the other electronics team members. And by spread those responsibilities, I mean your leadership will probably pass off salesplanners to the opening electronics team member and really only make sure attachments and survey scores are green. Everything else goes by the wayside.
I'm only speaking from my experience when I moved from electronics specialist to entertainment specialist and was never replaced. I was expected to do both jobs, but then the cuts came around and no one cared about electronics brand anymore. Once I promoted to TL...I think about entertainment and feel really bad for the guy who gets 15-20 hours a week to do what I did in 32-40.