A Stanford University press release today, advertising an upcoming "first time ever"(!) "advanced"(!) training program on creating and maintaining embryonic stem cell lines, used the seldom used "prospects grim" sales approach:
[I]t isn't as simple as just buying the [embryonic stem] cells and launching a new research program. The cells are in limited supply and are notoriously difficult to maintain in a lab. They can't be frozen easily, they are sickly, they quickly form new cell types rather than remaining as stem cells and the cell population changes over time.
Elsewhere the release calls embryonic cells "persnickety," making them sound like rambunctious little children. Wait, they are.