Make a proof of concept. Take several scripts that are similar to each other, rewrite them into modules, write tests. Show them how the number of lines to maintain was reduced, how easy it is to extend it. Shorter time to deliver, less bugs to appear, and if so, most of them caught before the code goes to production. That should convince them.

You might need to talk to your manager to get their support to do it during working hours, otherwise, you'd have to sacrifice your spare time.

I've been in a similar situation. My manager supported me a lot in the effort, but in the end, the best solution was to quit the company. May you be luckier!

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,

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In reply to Re: Convincing management for OO by choroba
in thread Convincing management for OO by pwagyi

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