A thing that worked some way yesterday and does not work the same way today is not a breaking change?
From the documentation “we recommend setting up your own SendGrid account when your app goes live”
I am not native but to me that does not really sounds like “do not rely on this service as deliverability is not guaranteed and this feature can be shut-down over 1 night with no upfront notice”
→ in addition → bubble doc is evolving positively, I am not even sure 2 years ago that warning was there as it is today.
→ in addition → given the amount of feedback regarding this in the thread about last month mail outtage, it seems clear that the limitations about the native mailing feature was not advertises enough.
Personally, I am not relying on this feature for critical stuff. I do use the native mailing feature but for less important admin reporting stuff.
But what I am concerned about is the short notice and the chanel these notice are brought through - I should not be monitoring the forum 24/7 in order not to miss some important announce.