[mgkimsal]

Worked on a project with an old (12+ years?) - but still being developed/used - Java system. Just last year a move was made up to Java 11 (from 8). Decent test coverage, but moving multiple systems is still a big task, but... they did it. Java 11. Yay.

But... teammates were running in to issues with 'new' stuff - like, using 'var'. There were others, but this was sort of the archetypal argument. "Well, it doesn't match the rest of the style of the file/app - it'll make it hard to read". Well... hrm... any new feature literally doesn't match the style of what came before it, because you have new keywords/features/syntax to handle processes a new way. It's definitional. But just because there's a new feature doesn't mean it'll be adopted (for better or worse, I supposed, depending on your stance).