Do I *need* to run "sync history" for Garmin?

I can’t find anything in any other threads, but do I HAVE to run the historical sync?

Everything in my Garmin Connect is already on Strava.

Can I just pause Strava (my last Strava run, pre-Garmin Authorization) is already uploaded, and Garmin will work from here on in?

You don’t have to run your full history sync.
Some people didn’t want the full history sync, so I made that optional for existing accounts.

Yeah, you can/should pause Strava so new activities will only come through Garmin. That will help the API situation a lot!