on a 6 plus? what i mean is i can scroll two now can i add more as these fill?
There is no limit on how many screens you can have. There was a limit in the past but I guess since iOS 6 that limit is gone.
Not true...the limit is 15 pages with up to 28 folders (assuming iPhone 6 Plus) on each page, each folder capable of up to 135 apps per folder (if set up properly for pagination).
In my humble opinion, if you need more than 3 or 4 pages, you probably have way too many apps. .... apps you don't really need. Besides, I always group my apps in folders. Right now, I have everything on one page and it is working just fine for me.