Newer phones are much better off in this regard.
I don't think carriers have realised just how much ill-will their crapware/crippling branding process engenders. In the past, they created a market for tools like Davinci, even though I resent having to use something like that to get MY hardware back into a sane state (and risk bricking it in the process). Now, they're pushing people towards rooting their Android phone. I haven't yet rooted my new (non-contract-encumbered) S2, but I'm sure it's just a matter of time. When I do, I'll be sure to install my usual selection of advert-filtering, revenue-denying proxies while I'm at it...