A bloody confederacy of dunces, you are, all by yourself. Exactly where do you think this stuff is stored so it is "instantly" available? It's stored in memory. All of it. Constantly. Modification dates, folder sizes, attributes, textual contents, pathnames, etc, etc, etc, up to, and including, the proverbial kitchen sink.
The full indexed database is saved/stored to disc only on system shutdown, or the exiting of the ES process - it is NEVER scanned for data upon request via the disc, not only would that be inefficient, that would be slow - hence it is kept in memory just waiting for you to pull your finger out and do something with it. Just remember to wash your hands first.
So yes, it takes up memory - does anyone care about that now? I don't think so. It's not uncommon for ES power users to have indexes in the GB range. If THEY aren't surprised by this, then why are you? The browser wars have moved on to other things to squabble about, and memory is plentiful in any PC built since the last Apollo mission, so it's a non-issue. First world problems!
No one uses ES because they are under the delusion that it's "light-weight" - they use it because it's fast. Yes, in this modern day of SSD's discs are fast too, but they are by no means as fast as memory, never mind not being quite as ubiquitous as some might believe.
It's also "worse" than WDS itself because, as stated, the index stores everything it's told to, the user can choose what to keep, what not to, and what to do with it - WDS doesn't offer much for power-users in options - you get what it gives you and bugger any transparency of control.
Also, as ES itself can use WDS directly ("si:"), users don't actually need to index things twice (like file-content), they can leave it to one or the other - or, like any power user worth his salt in RAM, they can use both and more. The important thing is they can CHOOSE.
The trade off is speed. You either want it, or you don't. You don't get to complain about it.
What do you use all your precious RAM for anyway? Anything? Or is it just sitting there waiting for you to start your belatedly autumnal late-life career as a spunky young youtube video editor? The world has enough of them.
It's good to rant from time to time - loosens the tight grip of subtle melancholia and doubt so constricting the modern soul.
Crocodile tears, mate, crocodile tears.


