Single event upsets and smart contracts

Dear all,

single event upsets (where a cosmic particle triggers a bitflip due to interactions with transistors) are a problem for critical computer infrastructure. I would appreciate any answer to one of the following questions from people that have dived into this topic before or have relevant knowledge:

1) From my limited understanding, aren't smart contracts (or better: the information about it) distributed over many computers? If so, then single event upsets are literally a no-issue, as the majority of computers wouldn't be affected as it is practically impossible for many different computers to face the very same single event upset. Thus, consensus wouldn't be affected at all. If this is the case, then the other questions are not relevant at all.

2) Can a single event upset mess up with a smart contract? I guess it is crucial to check how sensitive random changes of bits are to the smart contract itself.

3) If question 2) is to be answered with 'yes': Are there any countermeasures? This is especially relevant if Ethereum (or any other plattform) wants to become the backbone of future finance.