Why is the DVD image so large?

     * * * I am happy to ask the dumb questions * * *


This morning I see that we have FreeBSD 15.0 BETA4 iso stuff :

     https://download.freebsd.org/releases/ISO-IMAGES/15.0/?C=M&O=D

For doing a test install onto some real hardware I felt it would be nice 
to try out the iso images for ye old fashioned DVD. Worth a try?

However I see :

FreeBSD-15.0-BETA4-amd64-dvd1.iso     5150257152  2025-Oct-31 12:38
FreeBSD-15.0-BETA4-amd64-dvd1.iso.xz  4276839812  2025-Oct-31 12:38

Now the dvd1 image seems a tad large for an actual DVD media. I think
this has been the case for a very long time now.

Why is the DVD image so large?  Can something/anything be trimmed out?

-- 
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Dennis Clarke
RISC-V/SPARC/PPC/ARM/CISC
UNIX and Linux spoken