Something broke down somewhere ... I got emails a while back about the acquisition and giving options about whether to go along with the move or not.

Since Gusto is our payroll provider, I didn't see a reason not to do that... hopefully there will be less finger pointing the next time something goes screwy with the 401k transfers.

My guess is your different experience is precisely because you use Gusto as your payroll provider. My previous employer does not, or at least they did not when I was working there. This was truly the first and only email I've gotten about it, but I have always gotten regular transactional and notification emails from Guideline just fine, including yesterday with a confirmation that I'd changed my asset allocation!