I tried burning the FreeBSD 13 beta 2.amd64.iso onto a 4.7G DVD with K3B. K3B wouldn't burn it, because it said the ISO was too large to fit on the DVD (4555 MB). I burned it to a dual-layer DVD with no problem....but I don't know how many people would have those...
I do not think we are going to address this at this point in the release cycle, considering the ISOs can be dd(1)'d to a flash drive as well.
I have experienced the same issue. Currently I don't have any other DVD type nor Flash/USB. Maybe I will try an older version or wait a bit for the fixed. I just wanted to check how my machine supports FreeBSD, so nothing it's nothing urgent. I have found this bug report recently, but earlier I have started this as a topic on the FreeBSD forum, if you need some details for reference: https://forums.freebsd.org/threads/freebsd-13-0-amd64-dvd1-iso-is-too-large-to-fit-dvd.80184/#post-509329
There's many usecases for optical media. They last much longer, can't be rewritten, and are great for archival. I like to burn FreeBSD release DVDs for this reason. I understand having a memstick image, but if it's going to say DVD, it should be burnable to a DVD. I could understand having a Bluray image as well. How much work would it take to get the DVD ISO down to DVD sizes and make another for BluRay or memstick that's larger? disc1 has been too big for CD media for a while. I think it'd be nice to address that as well, but DVD is probably more important.
There should be a corresponding documentation bug with regard to the misleading statement at https://www.freebsd.org/where/#choose-image