There are people here running 50TB nodes, and others that run multiple nodes that together are 1+PB. So there’s a lot of data out there for you!
But yes, before the recent deluge of test data, it could take you 2-3 years to fill something like a 10TB HDD. If you haven’t run a node in awhile it’s an excellent time to restart: as there has been a firehose of TTL data coming out for the last week. Welcome back!