Question about delay subdivision on Boss DD8…

Basically the question is: what does this mean?

I see people complaining about the DD8 not having adjustable subdivisions on tap tempo and say that the DD7 is a more practical delay pedal for normal use.

I am about to buy my first delay pedal and I’m trying to decide between the DD8 and DD7. I do understand some basics of delay from when I made electronic music, but new to pedals.

I want to get a delay pedal that I can play live with and record with, I want something easy and intuitive to use. I love messing around with ambient textures, but I wanna be able to play with other musicians and use delay more conversationally too.

So I want to understand this subdivision problem with the DD8 so I can make sure whatever it is isn’t going to limit me in the future.

If anyone can help me understand I would be very grateful!

I played with the DD8 at Guitar center and it sounds amazing.