How could Monero scalability be solved?

Reposting here due to automated removal in r/Monero.

Monero has massive transactions compared to other chains. It makes me think that if it grew to a similar size as Bitcoin, that it's blockchain would be massive, terabytes relying on a few archival nodes.

Is that just going to be a downside of Monero? Does this meaningfully affect decentralization in the long term?