dyld VS ios-mail

None of what? In case I understood you by chance, there's a whole darwin stack on github, grouped neatly at https://opensource.apple.com/releases/. There is a lot of argument about what's open source and what's not, I consider permissive licenses as open source. I did never claim that any Apple software is open source, but due to OS's modular nature I'm willing to say that macOS and iOS consequently is largely open source

A lot of Apple software including the operating systems is open source, though in practice many of the key components that you might need to solve a problem or understand a bug are missing from these repositories.

I see that Proton (https://proton.me/) offers a fuller suite of tools these days beyond just mail: calendar/password manager/cloud storage/vpn

The pricing looks pretty good too at $9.99/month for everything

Has anyone migrated everything to them? How is it if so?

I currently pay for a Google Workspace on my own domain and iCloud for storage, which already amounts to more than Proton are charging (and Proton allows 3 custom domains for email vs Googles 1)

I've been running my own email server for the last 10 years or so using iRedMail / CentOS on a cheap VM. It requires very little maintenance and I never have problems with delivery (just make sure you have DMARC, DKIM, SPF, all setup).

Occasionally I consider moving to service provider but I don't really trust any of them with something so important. Especially Google, as there are so many cases of people getting locked out of their account with virtually no support available to them.

If I were going to switch to a provider, it would likely be Proton. They are based out of Switzerland and as far as I know have an outstanding reputation.

https://proton.me

If you have Proton VPN installed on an iOS, MacOS, or Android device, could you please try switching to the Stealth protocol (https://protonvpn.com/blog/stealth-vpn-protocol/) to see if you will be able to successfully connect afterwards. If you do manage to connect to a VPN server with the Stealth protocol, please try accessing proton.me afterwards and let us know how it goes.

Just for science, you should try a different VPN. You can get Proton for free if you sign up for Proton email at Proton.me. It’s at least another data point.

Meanwhile, you could try accessing proton.me from another web browser, disable any browser extensions on your current web browser, and make sure you can access any other websites on the same setup.

So two days ago I signed up with a fresh account with Brave, a VPN, and a fresh proton.me email. Went thru fine-- no problems, and used the site since. I used the site on my phone with the Brave browser, and fine again.

Proton AG is a privately-owned company and does not publish financial information, which makes assessing their future success or failure, or product strategy, difficult to predict. Any voluntarily released information is available through their website under Who We Are and Resources & Support, much of which is summarized on Wikipedia). I doubt that an officer or employee of Proton will provide insider information on Reddit that isn't already on the Proton website. Someone else here, who might be closer to the company, might be able to share better insights, but I see no reports of financial distress. I judge the financial and organizational stability of Proton to be at least equal to any of its competitors, and better than most. But these are my opinions and I have little concrete evidence to support them.

Proton is a decent alternative for email and calendar among others if you value privacy