We believe that if your computer keyboard doesn't ask for internet access, neither should your mobile keyboard. FUTO Keyboard is a modern keyboard app with voice input that is completely offline and never connects to the internet, in order to ensure your privacy and security.
I feel like people have forgotten how email worked before, when webmail providers were emulating the desktop client model of "received messages go in Inbox, Sent folder is for sent." Gmail's conversation view was shockingly intuitive, one of those "why hasn't it always been this way?" things that feels so obvious in retrospect.
A number of changes are being made at the same time, and only some of them can be opted-out of. This Lemmy post is focusing on one in particular that can.
Worth noting that it also has a bunch of free alternatives for sync, some self-hostable, and you were talking about the paid service hosted by the Tasks.org devs.
It's worth noting that a number of other providers now sell S3-compatible storage services that are completely separate from Amazon, but let you interact with them using any of the S3 tools that have sprung up.
Q.E.D.