Or all of the OEMs out there who do this out of habit...

I guess don't do upgrade-installs to 8.1 (though I haven't advocated doing those just about ever).

Why? I updated using the windows store from Windows 8 to Windows 8.1 pretty much immediately on my Lenovo Ideapad y510p.

Also note to future me: no, these ideapad notebooks have nothing to do with thinkpads. Do not buy an ideapad.

I meant upgrade installs on OEMs.

Like specifically HP, because HP had a default account of 'HP User' for years.

Thankfully with Windows 10, it seems to be possible to reinstall fresh. Not sure if doing so will reinstall all the crapware though.