Swap files are very fragile if you are using hibernation. For FDE I prefer LVM-over-LUKS and a dedicate partition
MacOS seems to have no problem with hibernating and it and its predecessor NeXT have been using swap files for over 30 years.
alt Hacker News
MacOS seems to have no problem with hibernating and it and its predecessor NeXT have been using swap files for over 30 years.