There doesn't seem to be any reason for customers to be concerned, and the contemplative style of the post is by no means new. On the contrary, it would be a matter of concern if the post wasn't primarily concerned with a retrospective on how they got to where they are today as well as individual styles, goals, personalities, and emotional fulfilment.
ICYMI, the departing executives in question did post about their plans, and (similarly to the OP) with a bit of reflection on their part:
https://hackernoon.com/after-6-incredible-years-at-buffer-im...
https://medium.com/@sunils34/parting-ways-with-buffer-ee016b...
There doesn't seem to be any reason for customers to be concerned, and the contemplative style of the post is by no means new. On the contrary, it would be a matter of concern if the post wasn't primarily concerned with a retrospective on how they got to where they are today as well as individual styles, goals, personalities, and emotional fulfilment.