Not just for datacenters either - warehouses, refineries, power stations, you could sell to anybody with a building full of expensive stuff.

I'd invest in digging equipment for the next war.

If your strategy assumes you can succeed against Iron Dome (which, I argue, is the state of the art for available air defense system), you should always be able to win as an attacker. Just have to test defenses ahead of time to understand level of effort required.

https://missilethreat.csis.org/countermeasures-penetration-a...

https://en.wikipedia.org/wiki/Iron_Dome

Also unlike in Ukraine local organizations are required to run on infrastructure inside country by law and even major peering points are very centralises. Connections between Russia and other countries are even more centralised.

So it doesnt matter in what order datacenters going to be destroyed. Ukraine just need to take down enough of them.

  The most serious disruptions were reported in Moscow and St. Petersburg, where users also experienced problems with T-Bank, internet provider SkyNet, and the Mango Office cloud service... Yandex Disk, Yandex Documents, and other company services... online bus-ticket sales in the Moscow region [via] MosTransAvto... Several major Russian media websites, including RBC, RIA Novosti, Kommersant, Vedomosti, Interfax, and Vesti... Russian Railways...

So I'd say the goal here is to intimidate and/or inconvenience the Russian public and general economy, which is the main way they'll advance a war against a country they are forbidden from invading to any semi-meaningful degree (due to nukes). Permenantly destroying data would be nice, sure, but service interruption is already such a huge win that it'd be a marginal improvement only, IMHO.

That is, unless there are cloud-native banks without backups, which... yikes! Possible, I suppose?

It seems to have somehow escaped your notice that Russia has been storming Ukraine for almost 5 years.

Second, the opinion of citizen does not count in russia anyway. It is an opinion of oligarchs and people in control that matters. Putin and his cronies are in their 70s and will go away soon. Whoever replaces the fuhrer and his clique needs to understand that messing with Ukraine is very costly affair. The more destruction is unleashed on russia now, the less bellirigent it will be in the future.