Surely significantly more than 100x. I'd hypothesize 10,000x at minimum from 15 years ago, at least if you measure total bits. Not sure how I could confirm that conjecture though.
However the number of actual, genuine content (so excluding SEO listicles and so on) is definitely less than 100x.
In fact it could be less than 1x in many cases. People that would have blogged about their Croatia trip might now instead just have a 10 word tweet, an instagram story (of similar low quality and probably not publicly indexable), or a youtube video (so non text content)
I don't think Google of 15 years ago will do a good job on the current age of internet. The size of web has increased a lot like 100x where most of the increment comes from unstructured formats like video or image and its signal to noise ratio deteriorated considerably. SEO has become much more sophisticated ever. A large fraction of useful information is now locked in the unindexed walled garden.