Why so much data usage compared to old service?

I have TMHI in North Carolina and ATT Fiber in Florida and it is my "opinion" that they measure usage about the same.   I was a Light Customer for a while before I was able to switch to the regular service.  At that time the 100 gig plan was $50 per month.  But you could get 200 gig for $100/mo and 300 gig for $150/mo.   Living with a 100 gig would have been a major struggle for me.  I had the 200 gig  plan and it was "manageable" but not easy.  I would use OTA whenever I could.  Next, I used YouTubeTV when watching streaming content...YouTube has the nice feature you can set the streaming resolution to 480p and save a bunch of bandwidth and picture quality is still pretty decent.  480p consumes about 0.6 gig per hour.  1080p (the usual standard) consumes 3 gig per hour.  4K can consume a whopping 16 gig per hour.  Also, when I am not at my NC Residence, my system will still consume about 8 to 9 gig per month just for background updates and running my security cameras.