Google Cloud is worth $225B and Waymo is worth $100B [1], so the rest of Alphabet is worth less than $500B in market cap? The math doesn't add up.
[1] https://www.cnbc.com/2019/09/27/waymo-valuation-cut-40percen...
[1] https://www.cnbc.com/2019/09/27/waymo-valuation-cut-40percen...
When the tech bubble bursts, either everyone gets bailed out, and it does become worth 200B. Or we are going to find out much of this tech money was speculation.
What's hard about running a server farm? Does it lend to this valuation?
There are two direct responses to your last question: all parts of running a server farm are hard, and a cloud platform is more than just a glorified server farm.