It's more a testament to the devs. I kept up with the RuneScape wiki Discord server for a bit and there were flamegraphs flying left and right. You can see some of there recent performance improvements here: https://meta.weirdgloop.org/w/Forum:Board_Meeting_-_2024-06-...

I think the theory is people edit more if pages load lightning fast. I can attest to that, especially if you use tools for partially-automated mass edits like https://github.com/wikimedia-gadgets/JWB