Do you make some QA checks as you grow up? Just asking as to why that is better for you.
I still use White Labs and Wyeast without fear.
Yeah me too I just don't spend $500+ dollars for a 20 bbl pitch anymore, I grow yeast up from packs.
There are multiple reasons why it is better, I can get packs of yeast within a week WL and WY were taking sometimes 4-6 weeks or longer to get me a pitch and when one showed up DOA that was a real problem. As far as quality checks, everything acting "normal" is a pretty big deal, once I have the pitch grown up I will do a cell count/viability, check for misshapen cells and do a sensory evaluation. If everything checks out I will pitch either into a 15 or 20 bbl batch depending on what I am trying to do. Takes me a week to go from a single pack of yeast to a 20 bbl pitch so time saving is huge and I have started a regular rotation so as to keep better track of generations.
Having the problems with WY has forced me to start taking more control of my yeast in house so that is a good thing but still smarting from the issues I had from them last year.
I still primarily use WL and WY, but also use Yeast Bay and Imperial. I definitely think that the explosion of craft beer has caused a strain on the yeast companies. I still trust all of their products but I do not think they are infallible.