Databricks cofounder Ion Stoica can explain what his latest startup does to a kindergartner on the fly. The basis for his new company SkyPilot, which he cofounded with Zongheng Yang, is this: companies need computers to run, different providers sell those computers, switching between them is painful and expensive, so SkyPilot makes it easy to use any of them, meaning “more compute, better compute, cheaper compute.” Today, Stoica and Yang are publicly launching SkyPilot, backed by $20 million see...