> Hence the practice of these articles in paywalled publications getting published online elsewhere.

OK, if you know a set of these elsewheres, perhaps you can help with this.

What's the absolute minimum viable research subscription (open first, then paywall) sites required to search and get access to articles for by-and-large all* research papers in science, technology, engineering, and math?

What about even just technology?

As a private individual who reads a lot of research, over past decade, I've tried several times to figure out the minimum viable total subscription coverage by starting here:

https://en.wikipedia.org/wiki/List_of_academic_databases_and...

But it adds up very quickly.

* Doesn't have to include obscure or niche.