Lighthouse is an automated website auditing tool that helps measure the performance and user experience of a site: https://web.dev/ 

Let's see how various publishers score:

PLOS ONE:
…https://lighthouse-dot-webdotdevsite.appspot.com//lh/html?url=https%3A%2F%2Fjournals.plos.org%2Fplosone%2Farticle%3Fid%3D10.1371%2Fjournal.pone.0230295

ScienceDirect:
…https://lighthouse-dot-webdotdevsite.appspot.com//lh/html?url=https%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fpii%2FS0924857920300674

Nature:
…https://lighthouse-dot-webdotdevsite.appspot.com//lh/html?url=https%3A%2F%2Fwww.nature.com%2Farticles%2Fs41591-020-0820-9

Wiley:
…https://lighthouse-dot-webdotdevsite.appspot.com//lh/html?url=https%3A%2F%2Fsfamjournals.onlinelibrary.wiley.com%2Fdoi%2Ffull%2F10.1111%2F1462-2920.15025

SAGE:
…https://lighthouse-dot-webdotdevsite.appspot.com//lh/html?url=https%3A%2F%2Fjournals.sagepub.com%2Fdoi%2Ffull%2F10.1177%2F1535676020919932

PubMed Central:
…https://lighthouse-dot-webdotdevsite.appspot.com//lh/html?url=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC7187672%2F

Europe PMC:
…https://lighthouse-dot-webdotdevsite.appspot.com//lh/html?url=https%3A%2F%2Feuropepmc.org%2Farticle%2FMED%2F32346093%3FsingleResult%3Dtrue%23free-full-text

Wellcome Open Research:
…https://lighthouse-dot-webdotdevsite.appspot.com//lh/html?url=https%3A%2F%2Fwellcomeopenresearch.org%2Farticles%2F5-17%2Fv1