Other than changing a core system across hundreds of stores, being held up by scotch tape, prayers and manual processes? Some ungodly mix of obsolete tech like

Other than changing a core system across hundreds of stores, being held up by scotch tape, prayers and manual processes? Some ungodly mix of obsolete tech like Oracle DB, unsupported Microsoft fad from decades ago, crap hardware? Gargantuan codebases without version control? This is all real-world examples I have personally witnessed in the field, I'm not a greying veteran. I saw a country-wide costumer-facing e-commerce site displaying the wrong prices for days because the ElasticSearch cache was being manually updated daily by someone who was on her probation period, not even a proper employee yet. She ran that job manually daily for months, including weekends, holidays, etc, until her father died and the production site was in stasis for that time. I'm pretty sure this was never ackknowledged oficially and she is still there earning about 1000€ per month.