On an Nexus 5 and 7 I could change to any version I want using Wugfresh Nexus Toolkit. On Windows 10, there is an explicit setting which allows downgrades and upgrades.
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Planned Obsolescence is not a meme.
https://www.japantimes.co.jp/news/2...group-leads-apple-probe-planned-obsolescence/
https://www.digitaltrends.com/mobile/france-investigates-planned-obsolescence/
Paris consumer protection group leads Apple probe over ‘planned obsolescence’
Tech giant to be investigated for possible "fraud," as landmark French law in 2015 made built-in expiry of products illegal
Planned obsolescence is a widely criticized commercial practice in which manufacturers build in the expiry of their products so that consumers will be forced to replace them.
It is decried by consumer groups as unethical and is suspected of particular prevalence in the electronics industry, which produces mountains of unrecyclable waste each year.
To tackle the problem, France passed landmark legislation in 2015 known as “Hamon’s law” which made the practice illegal and — in theory — obliged retailers to say whether replacement parts were available.
The law, named after former Socialist minister Benoit Hamon, stipulates that a company found to be deliberately shortening the life of its products can be fined up to 5 percent of its annual sales while executives can face up to two years in jail.
Planned obsolescence is a touchy subject for any tech lover. No one likes the idea that their time with their new tech toy is somehow limited — and the concern that a corporation may be pulling strings to make your tech slower and force you to upgrade sooner is one that appeals to conspiracy nuts and normal folks alike. And when it comes to this issue, Apple has usually gotten the worst of it over the years. The Cupertino, California giant was recently forced to admit that yes, tech does exist that slows down older iPhones, but Apple claims it’s for the overall good of the consumer.
It appears that Apple’s explanation isn’t good enough to fly in France, which has begun an investigation of Apple. France has some tough laws against planned obsolescence, with a maximum sentence of two years imprisonment and up to 5 percent of a company’s annual turnover. With a company the size of Apple, that’s likely to be in the billions.
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Its been proven that they weren't optimising for older devices all these years as this is the first iOS version in at least 7 years where the first build performs on par or better than the last build of the previous release . In fact they still haven't yet optimised all iOS devices. On the iPhone 5s and 6, iOS 12 is faster than iOS 11.4
On iPhone 6s and 7, its on par with iOS 11.4 or slightly faster than iOS 11.4 which indicates more optimisation is needed which will be finished by iOS 12.3