I used to do both standing and seated calf raises. But ever since I went with the theme of including my bodyweight in every exercise, I've only been doing standing calf raises. (Soleus be damned!) Since going with this approach, I've been doing one leg at a time. Initially, I used a dumbbell, but now I just use body weight, so my reps per set are anywhere between about 60 and 70 reps standing on the edge of a stair (now that I'm doing them at home during COVID). It takes about 4 minutes per calf, so calf work of only one set per leg takes upwards of 8 minutes.
Apart from my "lifting" leg workout, which is a set of slow and lightly-weighted pistol squats to failure, immediately followed by a slow split squat for the same leg to go past failure, I presently also do a total of 1,400 bodyweight squats at speed over 6 days of the week as part of my cardio. (200 squats plus ab work after the resistance portion of the workout, double that on the official cardio day, and 200 squats four other days of the week without ab work.) Although my calves are not embarrassing, they're not at all noteworthy.
So if calves are worked during upper leg work, I'm wondering if I should continue with the calf isolation work. I'll probably do them as usual today, and then I'll have a week to think about it. In the meantime, I hope others share their experiences with calf work as well.