eventually this (e2e encryption everywhere) will happen once governments realize their security and secrecy depends on the security of consumer technology and to protect the public is to protect themselves.
You’re more optimistic than me. I see it like Brexit: they demand all the advantages and none of the disadvantages and angrily dismiss anyone who tells them it’s an impossible combination.
In 2017, Prime Minister Malcolm Turnbull said, "The laws of mathematics are very commendable, but the only law that applies in Australia is the law of Australia".
The unprecedented and abysmal Assistance and Access Bill was just rushed through, against the advice of all legal and technology experts.
Any individual employee of a company can be compelled to install malware on their systems under threat of 10yrs jail and 50k, and they're not even allowed to inform their employer!
There is no judicial oversight and the one who determines if the spying is proportionate is the agency requesting the data, which is even State Police.
Under five eyes, that will be used to spy on UK, US, etc citizens and the information will be shared back. It enables the US/UK government to spy on their own citizens in ways that are illegal in their own countries.
Every Australian citizen has just become an unpaid black hat hacker/spy for the Australian government.
Have no doubt, this is coming to a nation near you.
When technical means will stop working they will issue the laws that make e2e devices without backdoors illegal or not easily obtainable. Not completely apples-to-apples comparison, but look at all the iPhones and androids where you can't have root and can't load another OS, can't side load apps in apple's case. In China you already have to have an app on your phone mandated by government at all times. And if you opt to have a "freedom phone" -- your life will become quite inconvenient (with some services impossible to get). TL;DR: even if e2e everywhere happens, it means nothing if you have to have a mandatory app on your phone.