ATTQOTD: I use Strava for my primary workout tracking app. I track everything in there... all my runs, yoga, indoor cycling (when I still had my old gym membership and was spinning), hikes, and cross training at Orangetheory. I like being able to see all my workouts in one place. I also like how it makes it easy to track my shoes. I originally used to use Runkeeper, but at the time, you could not have Garmin automatically sync to Runkeeper, and I got really tired of manually doing it every run, so I switched over to Strava and imported all my Runkeeper history.
I sync my Garmin to Strava. The only time I use the actual Strava app is when my Garmin battery is dead or it starts dying mid-run, I will start up Strava just in case I can't finish the run with the watch so that I have the whole thing. I just got a new Garmin last week so HOPEFULLY the battery thing is not an issue for a while, and I'm going to break it in this week at my race! My old 220 is over 3 years old and barely holds a charge for 3 hours and is extremely difficult to recharge because that model came with a clip style charger and 2 of the pins got stuck pushed in, so I have to set something really heavy on top of the watch to get the clip to make contact. I really like the plug in style charger cable my new VA3 has.
I always found the Garmin website to be really clunky and hard to use. I do have the Strava Premium membership, because you can link up Strava with your New Balance rewards account and earn points for each workout you track in Strava, and one of the things you used to be able to redeem your points for was 1 month or 3 month blocks of Strava Premium. So I used to build up points and then redeem them for 3 month blocks of Premium and pay for it that way. At some point like a year or so ago, you stopped being able to redeem the points for that, and I'm just lazy and never turned it off.

(Side note topical to the forum: you used to also be able to redeem your points for entries to Disney races... I don't know if that's still a thing, I haven't really gone to the NB site in a while since you stopped being able to redeem for Strava... I wonder if maybe that's gone away too now that they don't have the Disney sneakers and stuff).