I don't think an ad blocker should be assumed when calculating the size of a web page.
It would depend on precisely what you're measuring. If you're concerned about page loading speeds, then resources that don't block rendering or functionality (like, I assume, a proper GA integration) might not be worth considering. But if you're worried about, say, bandwidth usage, then of course you'd want to count everything.
This is true, although any resources loaded introduce CPU overhead, which can be non-negligible, especially on mobile.
I do use uBlock Origin in general. However, I disabled it while verifying if the download size claimed in this post is accurate.
Ad blockers already don't work. They're largely useless. If you use one these days, you already know why.
I don't know why. Can you explain?
Because of the large and rapidly-increasing number of sites that just refuse to work if you are running an ad blocker, unless you manually disable it first.
Can you link any site that doesn't work? It is easy enough to try and get past anti-adblock with uBlock Origin.
Try uBlock Origin. Don't use stuff like 'Adblock Plus/Pro'.
I think I can count on my fingers the number of instances of this that I've seen in my many years of using an ad blocker, and I don't even remember the last time it happened. To claim that some tiny percentage of websites doing this makes ad blockers "useless" is completely ridiculous.
they are LARGELY useful...
they do what they say on the tin, at least unless you visit some super agressive site which uses anti-adblock, but, then again you can conf up an anti-anti-adblock ;)