Most manufacturers seem to be getting little better in regards to updates, but over-all you're not going to see the same type of upgradeability as general-purpose computers and a certain other brand of phones.

These companies just come from a different background and their business methodologies are completely different, based on high product churn. They're trying to apply the same principles to smart phones as they always have to feature and dumb phones.

Google isn't interested in the slightest either because their OS is geared toward one thing and one thing only, delivering ad impressions. Android will get better and even more wide spread than it is now, but I think 2 or even 5 years from now, the same complaints will exist.