Our Mennonites do use horses and buggies but they will ride in vehicles and use cell phones if they need to.
We have wagon trains here that raise money for families in need. We used to ride in them. You haven’t lived until you spent all day on a horse or in a buggy, camped all night, and had barbecue at midnight that was cooked for hours in a pit in the ground. Everything is donated. The women cook and a farmer donates a whole hog or two for roasting.
Nothing like socializing in the Tennessee hill country.
Yeah I have Mennonite ppl in my family and have never seen them use horse and buggy, they own and use cars; their tech restrictions are more severe than I would expect most are,accustomed to. The Amish in my former area tend to be very severe in their rejection of modernity but some do use cell bones for work when they are actually away from home.