It takes years or decades to do the swap. You’ll have both teams working in parallel all that time which costs the company a TON of money. This process also ou

It takes years or decades to do the swap. You’ll have both teams working in parallel all that time which costs the company a TON of money. This process also outlasts aging managers. Chances are that leadership will shift at least once and decide it’s taking too long So they kill the replacement, switch languages and/or teams, and try yet again.