(The shining exception is WikiSource, where a complete unaltered transcription is underway a very laudable project, but as of this writing - 2022 - nowhere near finished.) Unfortunately, all those sites, with only one shining exception, fall into one of two categories: mindless OCR copies garbled and riddled with errors, sometimes subjected to semi-automatic processes seeking to correct them but often introducing further mistakes - or reinterpretations and expansions in which the Britannica has been used merely as a template, or selectively and tacitly abridged to current tastes, sometimes becoming merely a canvas for various agendas. So relevant that a number of websites have made an effort, or usually just a show for ulterior motives, to reproduce the entire Encyclopedia online. That said, the historical entries, written by top experts in the relevant fields, and backed up by superlative editing, remain good points of departure for anyone starting an investigation, and are still relevant today.

Naturally though, after a century much of it is obsolete: and even in historical matters many refinements and in some cases altogether novel viewpoints have been brought about by advances in archaeology, anthropology, genetics, literary criticism, and many other branches of knowledge. The eleventh edition of the Encyclopaedia Britannica, published in 1911, is widely considered to be the best ever English-language work of its kind, setting a bar that subsequent editions, and other encyclopedias, have never again reached.

1911 encyclopædia britannica