I don't know if this has been discussed elsewhere, but I think there's going to be a HUGE public outcry when they start installing iOS11 and find that some critically important apps such as password managers stop working. John Q. Public isn't going to understand the difference between 32-bit and 64-bit apps -- all they know is that the apps they rely on daily stopped working after the iOS 11 update. Almost none of them will have the technical know-how to revert their phones back to iOS 10. This issue has not been publicized enough -- many, many people are going to be caught unaware.
Obsolete 32-bit apps
32-bit apps have been on the cutting block for some time, I think. Have you surveyed your own device(s) to see what percentage of apps could be targets in this final purge?
Go to Settings/General (example 10.3), then tap 'About', then 'Applications'. A list of outdated apps requiring updates should show up.
If you can't tap on 'Applications' ...don't see an arrow next to it, that means you don't have any 32-bit apps that you'll lose use of w/iOS 11.
Turns out, surprisingly enough, I have none on my iPhone, but then I only have 150 apps on it right now, so maybe that's a factor.