[Question] What’s holding back outsourcing to cloud labs?

I would have expected Emerald Cloud Lab or similar competitors to go a lot and be successful over the last five years. As far as I know, like Emerald Cloud Lab only had modest growth and there aren’t competitors who grew strongly. Outsourcing to cloud labs seems like it allows the laberatory to have benefits of scale and virtualization that drives down costs and is easier to use then working in a wet lab. Is there something holding back this trend that I’m not seeing? Alternatively, what’s going on?