If you grafted small Ariocarpus e.g. agavoides, kotschoubeyanus etc, you can see flowers within a short period. The photo is A. agavoides grafted onto a Pereskiopsis stock.
I sowed seeds on 12th October last year and grafted 12 of very young seedlings.
Although the body size is still very small, it pushes up flowering buds.
I expect being able to see flowers soon.