I'm looking at putting an air line system in my shop. It'll just be used for homeowner type stuff...nothing really heavy duty. Heaviest use will probably be with a sander on occasion. I have some air tools but almost never use them. Right now I have a 100' hose/reel that I have to unwind/wind up every time I want air. It works...it's just a bit of a pain and invariably I need to move the hose around and out of the way of a vehicle or for something else.

My question is, is it worth going to 3/4" line over 1/2" for extra air capacity?

My initial thought is it's not. Plus I'd have to buy all new 3/4" couplers since everything I have now is 1/2".

I'm just wondering if there's anything I'm not thinking about, or maybe something I just don't know about, that would make it better to upgrade to 3/4". Cost for the system is about the same. It's just retrofitting what I have that would involve a higher PITA factor and cost for new couplers and stuff. Wouldn't be a huge cost but I'd rather not pay it if it's not needed for my applications.