yea but you can’t install GrapheneOS on Fairphones
for some people the environmental impact of using Fairphones or older Google Pixel (which CalyxOS supports longer) is more important than using a slightly more secure custom rom
for anyone looking for another custom rom: CalyxOS does support Fairphone 4 (and 5 later) while locking the bootloader with custom keys (unlike LineageOS for example)
yea but you can’t install GrapheneOS on Fairphones
for some people the environmental impact of using Fairphones or older Google Pixel (which CalyxOS supports longer) is more important than using a slightly more secure custom rom