There shouldn't even be a question where to put things much less a "wherever you want". Instead you want a sane, sensible standard.
mkdir derp
gmake install DESTDIR=$PWD/derp
Distribution maintainers have to patch this :(UEFI still boots. Spec said it can boot from fat in an eltorito floppy image and sun disklabels sit in the second or so sector. Spec also said it abstracts the type of volume so all boot methods always work for all drives. ISO images don't use the first 4kB so it doesn't see there's disklabel at all
So now I can mount the ssd as iso9660 but there's also partitions on it of which the third spans the entire drive (of course, because that's the c partition)
Edit: Oh I get it, "develop for the platform" means develop and distribute. Maybe it's just me, but seems like an important difference.
Everyone is still free to develop and distribute source code.
Other manufacturers do the same, where you have to wait a period of like 45 days before being able to unlock, and then have to ask permission on their website to unlock your bootloader.
Person_1: I found this great blogger whose writing I think you'd love.
Person_2: Oh, really?! What do they write about?