Commuting distance recommendations

Hey everyone!

Just got my new eBike (a hardtail MTB with a mid-drive, super fun!) and I'm looking to start commuting to work more regularly. My office is about 15 miles away, mostly paved bike paths but with a few decent hills. I'm curious what distances you all comfortably commute daily or even a few times a week? What do you consider the sweet spot for an eBike commute before it starts feeling like a chore instead of a joy?