I agree with ya Roland on the sharp chain being the best mod. I still have yet to master the filing of a razor sharp chain. Mine cut good, but I have used filed chains done by other people and they are a lot better. Porting is a powerful tool, such as JJ case, but most just have it done for fun and bragging rights. We all want that saw that just puts others to shame and a big smile on our face. How many videos have you seen on here and other places of ported saws where the chain just sucks? Almost every week it seems. So you may be old school Roland, but your argument still has weight and is warranted.
I use a grinder on most of my chains, mostly because it so quick. When i do take the time to sharpen by hand i can tell. I cut in a lot of dirty conditions so the grinder saves a lot of time, If i cut clean softwood all day i could see filing by hand and getting it perfect.
I have a grinder but still know how to file a chain... a lot of people don't.