there really is way to "shard" historical data. But mainly, it is expected, that most users will not use whole transaction history, but trust majority opinion o

there really is way to "shard" historical data. But mainly, it is expected, that most users will not use whole transaction history, but trust majority opinion of network without actually verifying it or even use services of established network nodes without actively participating in network. This can be seen even now, when there are disjoint sets of nodes that actually perform "useful" transactions (users) and nodes that timestamp them (miners).