"Gmailify links your existing account to Gmail" -- okaaay. At least it's stated clearly in this case. The whole merge-with-Google thing (which they've also been known to do as opt-out, albeit not in this particular case) is exactly the reason why I'm avoiding a lot of Google's services, and why I respect (and trust) Microsoft more in recent years. It just saddens me that Outlook for Android is so bad in some things, it's basically unusable (e.g. you can't follow links from emails).
Although, if activating this feature doesn't explicitly warn you that they're merging your account(s) with a Google/Gmail account, then it's worse than an opt-out.
