Fixing bugs and babysitting all day isn't going to convince people to stick around. Best you can do is get them something they can try to work with.
I wouldn't consider someone who spent 5 years on AWS, especially if they moved internally, out of date.
Whereas I've done nothing remotely close to where I want to be in about 3 years. I feel very scared about my skills, especially since I'm not even 10 years into my career.
An aside, even when you spend that long in a single position, you do need to keep learning on new and relevant technology; I attended every on house training seminar I could, which helped a lot, and spent a good portion every day reading. I spent 7 years at that company in the same effective role, and never changed job titles, but saw a >200% increase in take home pay in that same period.
To me, it's the cool-app-of-the-month-that-harvests-private-data-off-peoples-devices that is brain-killing.