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This fragmentation hurts portability. Code that performs well on one runtime may behave differently (or poorly) on another, even though it's using "standard" APIs. The complexity burden on runtime implementers is substantial, and the subtle behavioral differences create friction for developers trying to write cross-runtime code, particularly those maintaining frameworks that must be able to run efficiently across many runtime environments.
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从成熟市场看，这条发展路径已经很清晰。比如日本，宠物数量增长趋于放缓，但行业规模依然稳定扩大。围绕高龄宠物的医疗、康复、长期护理形成了一整条稳定产业链，而且周期很长，现金流也很稳定。
Role, BBC高級體育記者,