- Many of those applications that were hit by Y2K were developed 20+ years earlier and were supposed to live for 5-10 years. They were way out of spec.
- It's arguable that 2-digit years were a premature optimization, hence a bug.
The point behind me statement is that many younger developers feel that code "rots" - that it will break in spontaneous ways if they don't get to rewrite it. If it worked yesterday and, all things being equal, no-one touched the code/environment, it will most likely work today.
Being right, does not endow the right to be rude; politeness costs nothing.
Being unknowing, is not the same as being stupid.
Expressing a contrary opinion, whether to the individual or the group, is more often a sign of deeper thought than of cantankerous belligerence.
Do not mistake your goals as the only goals; your opinion as the only opinion; your confidence as correctness. Saying you know better is not the same as explaining you know better.