We have 2.5 RPG/AS400 devs in my department keeping our old legacy system alive and trucking. They're great devs and they do good work, but every time I get rop

We have 2.5 RPG/AS400 devs in my department keeping our old legacy system alive and trucking. They're great devs and they do good work, but every time I get roped into their side of things I feel lost and confused.