That is the discussion. Microsoft is pretending by making it the upgrade path for two products which actually are local, and hoping users won’t notice.

Honestly I’m glad they highlighted the telemetry. I went through the local report about what’s included and while it’s not an upsetting level of detail, it’s more comprehensive than I would have opted in to if asked.

Still, as sibling points out it’s in a completely different league from slurping up your IMAP creds, something which has always been local-only data. This is the second time I know of recently where MS has trampled on this kind of local-only expectation - the other was Edge defaulting to sending the contents of textboxes you’re filling out on webpages to the MS cloud for spelling and grammar checks. Thunderbird is still a sound recommendation, and unlike Microsoft, I trust that if I uncheck the telemetry box they’re not going to try to get me some other way.

It certainly is so :) https://blog.thunderbird.net/2023/10/thunderbird-for-android-k-9-mail-september-2023-progress-report/