Three sure-fire subjects to get gun folks excited:
1. 9mm vs. .45acp
2. keeping a firearm in a vehicle
3. brass vs. steel case
It's always entertaining to read! Opinions are like elbows - everybody has a couple.
IMHO: Some firearms are expensive, rare, or both. Treat them with care & shoot high quality brass cased ammo.
The rest of them are tools, either for serious use (defense, etc) or recreation (hunting, competition, etc). Use them, wear parts out, repair & replace those parts & move on. Shoot whatever is safe, and whatever is appropriate for your purpose and your budget.
There is no one right answer that fits all situations.