These were the first cacti my wife and I grafted ourselves at a workshop last year in August. Both took, and are growing FAST - love how healthy they are!
For reference, here’s a pic from last year (doggo for scale). Unbelievable how much bigger they are in less than a year!
What does grafting cactus do? I mean like what are your goals when doing so (I also had no clue you could graft cactus until seeing your post).