In all my brews,from kits to BIAB to electric boiler to my current GF set up,I`ve only ever used dried yeast sachets,due to the pure handiness,so I`ve a few questions regarding yeast. 1.Are liquid(bought) yeasts any better? 2.Is harvesting yeast from a brew just a money saving exercise?How do you know if the yeast cells are all live? 3.Can harvested yeasts be used on any brew and not just the same type? 4.Are these dumb questions?