But I know Samsung has the money and manpower to drastically improve the situation, yet they don't care.
With the right abstractions, they would only have a single version of "Samsung OS", like you only have a single version of Windows/Ubuntu. And all devices within reason would be able to immediately update to the latest version of Samsung OS, like PCs can.
And say in your example Samsung does get its shit together and spends a ton of money to upgrade every phone in the world...that's still ~25-30% of the Android population. What about the rest?
My hammer can do this but I have never had a smartphone that achieved it.
As a user, I don't really appreciate all the menus moving around, just because some designer in california needs a promotion.
Unfortunately, currently, updating a device might mean making it useless.
This makes no sense whatsoever. West Bengal has the same carriers and bands as the rest of the country.
Neither does a 1:5 scale model of Big Ben, but Kolkata has that too.
I'm sure there's a knob I can tweak somewhere that makes it work, but a Xiaomi handset is like $20 so I never bothered.
Never heard of vivo. The other 2 are well known phone brands in italy.
Please stop considering US+Canada == "most western countries". Xiaomi and Oppo are big brands, quite popular in Europe (especially Southern Europe), and FFS Oppo are one of the major sponsors of the Champions League, one of the biggest and most popular football competitions in the world.