> If he means the size of the full blockchain, in practice Ethereum implements compression techniques that make it much more compact--the Bitcoin blockchain is

> If he means the size of the full blockchain, in practice Ethereum implements compression techniques that make it much more compact--the Bitcoin blockchain is currently at about 100gb, while the uncompressed "archival" version of Ethereum is at 300gb but the standard compressed version only requires about 15gb. Are you referring to "pruning"? Bitcoin can do this too and pruning is not compression as it cause big information loss (you need to download information from other, non-pruning nodes if you want to bootstrap new one).