Hmm, I don't know. I've been going hardcore into a total FIRM and related instructors/systems obsession to the point where almost all I have are those, plus Jari Love, Ellen Barrett, and a set of walking stuff from Leslie and Jessica. I've gotten rid of nearly everything else, including some ancient Jane Fondas that I used to really like. I have some random yoga and pilates from other instructors, but since the pandemic hit and I stopped being able to go to my local yoga studio (where I was doing twice-weekly yoga and barre classes), I am 9 days out of 10 going to do either a FIRM or FIRM-like workout or go out jogging for 3-5 miles. I've even started trying to collect all the FIRM workouts that I don't already own, which is starting to get expensive, but I figure if I enjoy it, and I can't get to a studio or gym, why not?
I vastly prefer DVDs to streaming for workouts. I have a subscription to the streaming service that has BeMax on it, but the Roku in my workout room is fussy and it's honestly just easier to plop a DVD in (I still prefer streaming to DVDs for regular TV and movies, though).