作为云计算从业者, 始终也是上云的坚定. 也不知道是因为屁股决定态度, 还是”因为相信所以看见”.

但今天看到一则推送, 马斯克440亿美元收购Twitter一年后：全力“下云”，成本速降60%，功能代码从70万行减少至7万！ 真的让自己大跌眼镜, 不得不仔细思考.

• 20221019: Why we're leaving the cloud
• 20230110: The only thing worse than cloud pricing is the enterprisey alternatives
• 20230221: We stand to save $7m over five years from our cloud exit
• 20230323: Cut cloud before payroll
• 20230406: The hardware we need for our cloud exit has arrived
• 20230502: Cloud exit pays off in performance too
• 20230503: Sovereign clouds
• 20230511: It's not just cloud costs that are out of control
• 20230623: We have left the cloud
• 20230915: Our cloud exit has already yielded $1m/year in savings
• 20231027: X celebrates 60% savings from cloud exit

The cloud excels at two ends of the spectrum. The first end is when your application is so simple and low traffic that you really do save on complexity by starting with fully managed services. The second is when your load is highly irregular.