Phenomenal for those low powered servers you just want to leave on and running some tiny batch of cronjobs [1] or something for months or years at a time without worrying too much about wear on the SD card itself rendering the whole installation moot.
This is actually how I have powered the backend data collection and processing for [2], as I wrote about in [3]. The end result is a static site built in Hugo but I was careful to pick parts I could safely leave to wheedle on their own for a long time.
[1]: https://til.andrew-quinn.me/posts/consider-the-cronslave/
[2]: https://hiandrewquinn.github.io/selkouutiset-archive/
[3]: https://til.andrew-quinn.me/posts/lessons-learned-from-2-yea...
Before RPI existed, I always made filesystem images for USB sticks in NetBSD so that writes never touched "disk" ("diskless"). This allows me to remove the USB stick after boot, freeing up the slot for something else
BSD "install images" work this way
I have been using the RPi with a diskless NetBSD image since around 2012; there are no SD card writes, the userland is extracted into RAM
I can pull out the SD card after boot and use the slot for something else
If I want data storage, I connect an external drive
It's been wild to read endless online complaints from RPi users for the last 13 years about SD card wear and tear
To me, it's another example of how it's possible to have a solution that is as old as the hills and have it be completely ignored in favor of a "modern" approach that is fatally-flawed