Omitting /usr/src & /usr/obj partitions?

[fox2]

Hello folks! Maybe this is a dumb question.. I'm wondering if it's reasonable to save space on and/or omit the /usr/src and /usr/obj paritions completely?

• I'm not planning to add users to the wobj or wsrc groups.
• I'm not planning to compile BSD from source on that system.

That said, can any problems arise from just omitting these two partitions and use the space (several gigabytes in auto-layout for 40GB SSD) for /home or /var ?

Are these partitions needed when upgrading the system using sysupgrade?

Bonus questions:

• Why does auto-layout contain a /usr/X11R6 partition even though I'm answering "no I don't plan to run X on this system" during setup?
• Is there any documentation on the intentions behind the installers recommended partitioning layout and the used file system flags?

Thanks in advance for your help!